I have been using the "guest from China" for a couple of months in the country. He has already participated in the construction of an 80 m fence and the assembly of rafters on a 4-pitched roof. He never complained and did not whine, at the moment when he was "tired" he simply turned off, making it clear that it was time to "feed". Pros: Comfortable to hold. Durable plastic. Powerful. The battery lasts a long time and charges quickly enough. Different cons: There is no strap on the handle, although this is more of a nitpick.