I got the bag of three of them when they were on special for 249 at the hilti store. They are tiny and very light, which is useful in a lot of situations. Power is very good for the size I find, but even though they are the same voltage, my old c12 seems more powerful. (Can't seem to kill that thing.)
Trigger is nicely responsive, and I didn't notice any appreciable runout in the chucks.
The driver and the impact have quick change 1/4" chucks which work well. Never used the hammer function yet on the third drill, which has a Jacobs chuck, but I can only imagine it is light duty.
All told I would say they are a good value.