Maybe I had just bad luck. After the many enthusiastic reviews bought, in the awareness of having "a Bosch" done. Unpacking, full of anticipation opened the suitcase. SCHRECK Green plastic chips, green plastic dust everywhere. Do not let irriteren (can indeed times happen) and the unit reasonably clean. Run short. NEXT SCHRECK Now I know why the machine has these elaborate handle. She shakes and vibrates that you get loose teeth. - Well, I had just worked with a loaner from a hardware store, a simple rotary hammer from Bosch Professional Series. The quiet running worlds, even during tough drill bits. Love Bosch people, nothing. Against DIY quality and scaled-up series, because the handyman nunmal must not drill 200 holes a day, for ten years with the same machine But this is an impertinence! I hope this has been only a Monday device, but of the series fed up. Placing an requested and return it! A little Makita rotary hammer in the same price range is seen on the way to me, sometimes ...