Used this to get rid of 4 very large and very solid concrete steps. A sledgehammer and spike barely made a dent so after comparing prices to rent one I decided to just purchase this. It turned out to be a fantastic decision! This went through those stairs like butter!. This is a bit on the heavy side but not as heavy as a full sized jackhammer which I don't have the strength to carry let alone operate. It's very easy to use and the stairs were demolished completely in about 6 and a half hours total. I couldn't do anymore after about an hour and a half each time because of old injuries. I don't regret this purchase a tiny bit and would recommend it to anyone. No issues with oil leaking or anything. It's a bit difficult to insert the bits, there is a knack to it but lots of videos on YouTube if you need them. It comes in a case with wheels so very easy to transport. Very pleased with it.