I have set for our home remodeling for the first time doses. With the Hilti and the drill bit (with shock) no problem. All teeth are still there and the crown period in unterschiedlichstes material. Predrilling I've saved me first. The pilot drill is the weak point. The fixation does not hold long in spite snap ring and the drill becomes loose. For our conversion for me not an issue. I drill the holes with a Kaiserbohrschablone before anyway. For the outbreak, it is sufficient if the drill is loose in the recording.
For professionals certainly not the ideal tool. For single conversion price performance perfectly fine. Considering the price that gives me 4 stars.