I was a bit concerned about buying this thing as the reviews were mixed. I was looking for a way of finding a junction box in my old house that was plastered over in the ceiling, and I really can't get to the attic. It was behind plaster, and i did not relish in the idea of large holes in the plaster to fix.
I looked at the real construction grade inspection cameras, all that were >$200, so I took the risk on this thing for around $40. It was a winner. In three minutes I found the box with drilling 2 very small holes and carefully threading this up into the ceiling and looking around.
Pros: - Cheap cost, well built. - Simple to use. - Don't need the software, it just works as a webcam. I was actually using skype's camera viewer to do all this on a MAC. - Seriously amazing packaging.
Cons: - As another reviewer states, the focal distance is short, but your in a wall.... What do you expect. I can still tell what something is from feet away. (Its a lot more than inches as someone stated). If you are looking for a box in a ceiling great. If your looking to read the bar code off of a box from 6' away... Probably not a good choice. - The light is really needed if you are working in cavities, but this claims to have a dimmer. The dimmer has almost no play. Its really just on full or off. Which is fine. On is what you need to find something anyway. - The orientation can be tricky at first, but you get the hang of it pretty quick. - The USB cable is so short, and its a bit of annoying to hold a laptop (or have the laptop in view) while probing around. Get a USB extension cable. Again workable for the price.
I don't feel ripped off by this thing. It was worth it, and I will have lots of other uses in 'This old house'.