Yes, I do use it for level and distance, it seems to get that right, the only thing in need of tweaking were the sub outputs but they were very close. Actually unlike the other units the Audyssey curve was very close to my curve from my measurements. So that seems to be improved on this unit from the previous ones.
So the speakers are essentially flat at 1 meter from the speakers, Apart from the roll off of the center and side surrounds, at 47Hz and 52Hz respectively, second order roll off at that point. The room curves at the listening positions look like they should. You should never aim for a flat line at the listening positions. The room has no nasty peaks or suck outs, as per design, and the speakers are very flat with the left and right main getting to 20 Hz no problem. The rear surrounds get very close to that. The system can produce full concert levels and never sounds in any way stressed.