QLOCOM WiFi Extender Booster 300Mbps WiFi Extender 2.4GHz

The range extender for the most part works pretty well, I have it situated almost line of sight to the router, in an area I get good coverage from, the router is not able to reach to my garden shed by itself, however thanks to the extender I now get a reasonable signal out there. Setup could have been easier, the process is very straight forward however the web interface you need to access it is hit or miss. I had to attempt to log in about 10 times before I got access, the previous times the interface only partially loaded, I tried on an iPad and an android phone, maybe it would have worked better from a non mobile device.
There are 2 lights on the front, not sure exactly what they represent, one is clearly the power which is blue, the other light jumps from blue to red every 10 seconds or so, the instruction which came with it, although adequate were rather basic and didn’t explain the lights.
The reason for the 4 stars and not 5 is that I have found it to be a bit glitchy. The signal strengths are all fine but my chromecast more often than not does not connect, I have to turn the unit off for 10 seconds and reset the chromecast in order to get it to connect, all other devices seem to work reliably enough, with the occasional drop off, the chromecast works fine connected directly to the router, but I need it out in the shed, thus the extender.