I'm not the world's greatest at DIY, and to be honest before I got this device I wouldn't even have thought of looking for wires and studs before taking a hammer to the wall. Now that I know it's a thing I need to do, I'll always have this device handy. The colour coded warnings are clear enough for even an idiot like me to understand. My only consideration is that given how specialised the device is, I'm not sure I'd be willing to pay the sticker price for it.
 Good luck to date has I guess protected me in the past.