I bought it hastily from a nearby store to do my job. I have had it for over 5-6 months and it works like a charm. It has fallen 2-3 times and nothing happened to it. It is very sensitive in detection and convenient, like having a marker in your pocket. Overall, it doesn't envy much from the more expensive ones. As for the negatives, I would say that if it gets too dusty, it struggles for a while, so be careful. I imagine it will definitely break in water.