A while ago I sent a reply to one of the reviewers for the first time and let them know that I had the opposite experience with them would have . with this beat. He had problems with it, but no experience. Now I feel I have to give my own review to make up for another bad review. Just yesterday I had to drill a few more holes in the granite. I pulled this bit which had been sitting for over a year since last using it and got the same great results again. Now I've cut about 4 holes with that bit size and even if it breaks tomorrow I'm definitely worth my money (PS I bought a set of Bosh diamond bits for $270 a long time ago and they were useless. Couldn't even get on scratch the surface).