So I read a few comment before I purchase this demo hammer. Couldn't really believe for a name brand tool this would cost over 1000 dollars normally. It kinda shocked me. I'm not going to say it will knock down a concrete home. But it did impress me. I demo a slab that was 3ft by 5 ft and 12 inches thick. I took two breathers for about 5 mins each and and hour of work and the slab was in pieces. Of course nothing will bet an air hammer in speed. I've used one and they will cut anything in secs. But for a small business owner looking for a demo hammer that's not used everyday or a he owner doing thier own projects. Nothing will bet the price factor. It also came with a second set of brushes so when the first set wears out your good. Remember to check the oil often and tighten all of the bolts on the oil res plate.