I'm, on PC. Yeah i still notice some funny things with backdrop not "sticking" when changing the view. I haven't set up any custom viewport stuff yet. But so far symmetry looks rock solid. I'm trying but can't break it
. And just for you, i created a sphere, turned off smoothing, pressed "D" 5 times and was able to sculpt on around 280,000 real polys. It was a bit sluggish but still usable. But at least the resulting sculpt was very smooth...
shorty