I agree with the reviews available and can still add my experience. I was just about to touch the concrete and the "old" made flabby. With the Makita it was easy and when the load was too large, the electronic regulated easily from. Drilling in concrete was quick and effortless.
A small hook I could find at the hammer. Changing the chuck was not so easy for me by the hand. Since I still have some practice times, then it will probably work.
mfg
Makita friend
Wolfgang Lange