Read a lot of negative reviews before making the decision to get this. I read some reviews on another site and found that it was mainly user error that may have led to the bad reviews.

I find that you need to ignore the audio sensor and go by the meter guage in the display.

Well made, comes with a case and battery. Expensive compared to other brands, but definitely get what you pay for.

Works really well and user friendly. Best I’ve used so fa

It may just be me, but I have not found this product to be as reliable as I would wish. Perhaps it just takes a lot of practice, but I would expect a relatively expensive meter such as this one to locate known studs and wiring quickly and reliably. It doesn’t. Sometimes it pinpoints the centre of a stud or joist very accurately, other times it misses the same target completely. I find that I need to combine the readings from the meter with another more low tech way of checking the location of studs (ie drilling little holes) before I commit to identifying the outline of the stud. Consequently it is of limited use to me.

Great tooldoes exactly what it says it will do and with a good degree of accuracy too found it great for locating items buried in walls, and this saved my neighbour from going through a load of cables running everywhere in the walls of his kitchen well worth having this in your tool box I’ve had a few locators over the years, but this is the best I’ve ownedwell pleased with i

Works well for finding studs and buried metalwork (pipes), but not so good on live cables as it often beeps in any position on a wall, even a wall where I know there are no cables. This makes it difficult to accurately detect where a cable actually is. Some walls worked well and some didn’t, so I guess it is probably picking up interference from elsewhere. Placing your other hand on the wall (in the instructions) does help. The centering works really well although you do need to read and understand the instructions on how to do this.

but solid walls not so well
must take your time and check lots of times to make sure

I saw some negative reviews but I like all my Bosch products so went ahead with the purchase
Works perfect so cannot agree with negative comments

Wanted this as completely renovating a house. on the plus side finds electrical cables brilliantly, but for copper pipes a bit hit and miss at the moment, but still trying to calibrate it so works perfect, not sure if going to get there but will try.

May review my review at the end of this job!

for the price it works well and does everything it should

Angular construction and large size doesn’t make for comfortable use.
Seems reliable and repeatable for sensing power and batten positions.

Excellent product. Does what it says on the box and is really easy to use.
I tested it on walls where I knew pipes and cables were and it identified them straight away.
Really impressed so far.

This is the best sensor for wiring or metal/pipes and structural elements I have had.
Other ones did not give me any confidence

The detector is easy to use and works well. Extra, unexpected benefit/ use – detecting shot in prepared game, works really well

Fast delivery, got it cheaper by getting it “used” but it’s new in every way! It seems to do its job as iv tested it on areas I know.

Great top quality product that does exactly as meant to.
Highly recommend along with watching an online event tutorial for produc

As long as you follow instructions which will allow you to discard false positives it is money well spend. Money well saved too vs drilling through a cable under current or a water pipe

You really need to practise using it for a while to understand how it works. That’s not a criticism of the tool, just the reality of what this gives you over the cheaper simple metal detectors. For a couple of days I was convinced it was over sensitive and telling my walls were filled with cables criss-crossing them. The electricity detector was bleeping and flashing every time I got within 25cm of a wire.
Tips for use. (1) Do not expect to get an accurate reading by putting straight on the wall and doing a simple single pass. It has some kind of auto sensitivity (instead of the wheel you turn on the cheap models) which means you need to run backwards and forwards a few times. (2) Look for the second meter to show the centre dot as it passes over known wires. Get used to when the meter starts sounding/flashing verses the location of known wires and when it just shows a solid Red/Amber. Look for the centre-dot to appear as you move across the wall (2) keep going over the area – at least three sweeps; and note that as it approaches something it detects it further away than the reverse when moving away the other side (e.g. the signal fades quicker than it builds up) (3) Hold it properly on the grips and not the head. Holding on the head seems to affect it and lose accuracy (4) put your other hand on the wall. This is a key one as it seems to be affected by static build-up giving more false alarms. I found it was a lot more accurate when I had my other hand resting on the wall I was detecting.
If you are prepared to work with it over time then it will give you a lot of confidence, but this is no instant “x-ray” tool. Given all of these tools are just small metal detectors (with, in this case, some microprocessor logic helping you) I would go as far as to say this only gives you a 15% greater knowledge of your wall than a 20 detector, so it’s the value you place on that extra 15% knowledge verses paying thrice the price. If you want more than this you’ll need to find tools that work very differently – this is model is as good a tool as any using this technical approach.

This was overkill for putting up a cupboard, justified by the idea that it’ll be useful in the future. Awesome tool, really straightforward.

So far so good. Always drill with caution into walls but this is a great back up tool.

This device errs on the side of alerting you too much to nearby electrical sources (which is a minor problem in modern houses with plasterboard walls), but other than that was a much, much better buy than the cheap Black and Decker BDS200 which I’d purchased previously, and simply doesn’t do the job at all. This Bosch GMS 120 has some good, sensible features too, such as the hole that you can use to mark the wall in pencil. Very happy overall, and its encouraged me to buy other mid-range Bosch products for other jobs around my house.

Easy to use, with clear display and warning beep, but not 100% accurate in pinpointing obstructions in the wall cavity. However, probably the best detector we have had so far.

Not quite as accurate as I hoped, but still ok nonetheless.

I’ve no idea why people seem to think these are inaccurate. I bought one of these for my business and within an hour I have satisfied myself that it’s accurate enough to be trusted.

If you have a fair understanding of how buildings are constructed and how services run then you can use one of these to establish where steel joists, rebar and wiring is.

If not, then perhaps you need a professional to come and help out. For example “the whole of my wall is detected as metal” is probably due to foil backed plasterboard, especially if it’s on an external wall. In those cases, you’re a bit stuck, although I’ve usually found that a small hole and a wire coathanger helps immensely with probing.