It just works
Works exactly as described, easy install too.
One small annoyance when downloading videos, it limits how many you can download at once but no big deal, just seems like a restriction for the sake of a restriction.

Good picture quality
This is the second Nextbase dash cam I have purchased. The first is 322 fitted to my daughters car. I have punched the 622 for my car. I find setting things up on my iPhone difficult because of my sausage fingers so used my iPad. The setup was straightforward and the camera carried out a firmware update. Time and date transferred from the iPad. The default settings are good but I did change a couple of options. I purchased the wired rear camera option. I installed this in a new car and it was quite simple. I used the cigarette lighter power supply supplied with the camera, not wanting to interfere with the new cars electric system. Routing the rear camera wire was a little more challenging but ok. I have been suppressed that the cable can be routed along the roof lining and cover trims with ease. When fixing the rear camera to the rear window make sure you stick the fixing in between the window heater elements. The sticker is oval so it should fit ok. My car is a hatchback so it’s important to ensure the camera is placed in a position that the wiper clears the glass. I have checked the results of the recordings and I am very pleased with the picture quality. I am still testing and fiddling with the odd setting but I am very pleased with camera. Just a note, I could not understand one option and emailed Nextbase. They emailed back with the answer, all very good.

Such a great camera.
Great camera, highly recommended. Planning to buy another for the second car. I was told the camera suppirt upto 128GB, However I’ve been using a 500GB without any issues.

My 2 issues with the cam is the software for the mobile.

Yes you can download the videos to your phone however you can only access the footage through the app.

There’s no seek feature in the app, you have to go back and find each files. Would be nice to go seek from 1 video footage to the next without having to find individual files.

UPDATE: Now in the app you can download videos to your phone and access outside the app.

Ignore all the negative reviews. This is a flagship dashcam and performs as such!
The video quality both day and night is fantastic. I have the 622GW running 4k30fps in the front and the rear window camera in the rear at 1080p30fps. Both are clear and sharp, especially the front one at 4k. Number plates and signs are easily read.

The enhanced night vision mode which the camera automatically switches to when needed is brilliant. The polarised filter on the front is also a huge bonus.

I’m impressed at how well it just works out of the box, parking mode is perhaps my only complaint with it saving a locked file every single time I get in the car as the g sensor is overly sensitive however with a 128gb card, you can just format it every month or week to stop the locked files filling up your card and I’d rather it too sensitive and not recording when someone hits my car gently enough to cause damage but not activate many other dashcams.

The hardwire kit is a must for me, the battery of the camera has so far performed very well however with tit being constantly charged and discharged I can’t see this being the case forever so I think it’s worth the piece of mind to hardwire it to your car’s battery.

The camera takes good quality photos even at speed which is also nice, possibly a handy feature for some though I can’t think of any situation I’d use it as I’d prefer a video or would just screenshot the video for a still image.

The mic is good, perhaps a little quieter than some cameras but it’s clear and road noise isn’t bad at all, it picked up my horn, voice and other horns and such within reasonable distance of the car. Remember you are in a sound insulated box of metal on wheels so don’t expect miracles.

The speed and GPS readings built into the camera is brilliant. They overly nicely into the bottom of videos alongside your number plate and camera model.

I’ve not used the app much but it’s worked flawlessly when I have. Downloading videos via WiFi was very quick and easy as was live view mode and watching back videos showing telemetry and map location data.

The camera has never crashed except when I removed the SD card without stopping the camera recording which is honestly expected and a simple reboot instantly fixed it. I was also pleased to find the only video that was corrupt was the one recording at the time which is good as other dashcams I’ve had have corrupted every single file on the card when doing this causing me to lose a lot of footage, fortunately nothing I needed.

The rear camera also doesn’t reduce the max resolution of the front camera which is great to see as many do this and it’s very frustrating.

I’d strongly recommend the camera with the rear camera if you want great quality footage. The steep price is worth it. The camera feels durable, is well thought through, built well, works well and is very user friendly.

Good quality camera, disappointing upgrade
I upgraded from a 612GW (The previous 4K version that Nextbase sold) and found that the new model wasn’t leaps and bounds different from the old model. With benefit of hindsight I should probably have skipped this model.

Why?

The picture quality
Whilst sharp, seems to have a colour balance issue (when viewed on the LCD screen). Images seem to have a (very slight) red tinge to them – the pictures on my old 612GW seemed a lot more natural. The angle of view is slightly narrower at 140 degrees compared to the 150 on the 612GW.

Poor Alexa integration
I was sucked in by the Alexa integration – unfortunately for me, I only seem to get audio from Alexa when my phone is plugged into the car USB and set to Apple Car Play. Seems a bit excessive to have Siri and Alexa vying for your attention. I was hoping that the camera would connect to my phone and then whenever I asked Alexa something then the audio would be automatically broadcast to the car speakers via the normal phone-car bluetooth like a phonecall. Doesn’t seem to work like that

So the key gimmick of this camera is a bit of a washout for me.

Color of camera
Being a light Aluminium/Titanium coloured brushed metal finish – it’s quite obvious from outside the car that you have dashcam stuck on your windscreen. I would have prefered it if Nextbase had made this more stealthy black to keep prying eyes and opportunists away. The bright white model number on the side of the lens is not great in this regard either.

What if you’re buying your first or upgrading from a (much) older camera?
Good Quality
This camera is great quality – there’s a real solidity to it and the accessories that are supplied.

Sturdy mount
The magentic mount on the front of the camera is now easier to remove so that you can hide the camera away when not in use, but be warned – the magnet is very strong. You have to twist the camera to pull the camera off the mount – upsetting when you’ve positioned the camera just so that it’s got that perfect balance of car and sky…

Low profile mounts
The new mounts (suction or adhesive) are low profile compared to older models which means the camera doesn’t hang half way down your screen when mounted

Good app and Easy setup
The menus on the camera are a bit difficult to navigate but settings easy to change. You can alternately use the app for your phone to change settings

Polarising filter on lens
By simply twisting the small filter on the front of the lens you can reduce reflections from your windscreen – it doesn’t get rid of all reflections but it definitely helps

All in all, a great camera but probably not worth upgrading if you have a previous gen 4K.