they are good , and with a good dust extraction they are amazing.
For professional work the Hilti stuff is really good. the dust extraction on them is top of the range . and if it breaks in warranty ( crossrail sparks - heavy handed) a new one arrives the next day by courier. best turnround we had was calling the rep at 09.15 , he turned up at 10.00 as was local and gave us a brand new one from the stock in his vehicle .
Those who think they got away with things had better watch their backs.
That's the reason we moved to Hilti. The cordless DRS extraction is great. We did have extract on the Bosch but it was cumbersome and needed a vac with it.