i have one, and yes, i still like it after several months. For some reason, it does nothing when taking pictures (pictures aren't magnified). Probably something w/ lenses through lenses and perhaps something w/ my phone auto-focus/zoom.
In any case, that's not what i use it for. My clowns regularly breed, and it's really cool to watch the progression of the eggs. It also makes my clowns look gigantic which is pretty comical when looking at the tank from afar.
Yes, it would be good for locating/identifying pests as well.