Ive been using the magnesium impact professionally for about seven years...The first one I got quit after a few months, so I exchanged it for the one Im using now. I saw many of them brought in for warranty. My current one works ok, but it will "start up" on its own if left plugged in, its a hassle...imagine an impact swivel and socket swinging around like unbalanced rotor blades. LOL! I dont recommend it, way more torque than a bottom of the barrel impact, but far less than better ones ive tried. Even for the diy guy I think you should get something else. I also got the 3/8 super duty air ratchet at the same time, and it has been pretty good. The problem ive had is you do not want to "over oil" it..more than a couple drops, and the damn thing locks up.