I am not into breaking concrete slabs and bought one of these hammers for easier digging fence post holes in rocky southern Missouri soil and it works fantastic. I have a small 2500w generator so I can operate it any place on my 30 acres. I fabricated my own extra long hammer bit by using a chop saw and welding an extension into my hammer bit shafts. I have never owned/used any other demo hammer so am in no position to compare it to any other make or model. With my fabricated bits I can dig a 24" deep post hole and the tip of the tool is still well above ground level. This unit will dig a hole where my rear-mounted PTO tractor auger wont go once it hits fair sized limestone.