I haven't had any problems with it since the first patch came out last April. It's fast, clean, and takes most of the headache out of modeling clothes. The multiple grouping features and simplified mapping set up are huge time savers for me.
Pegasus was pretty shaky when it launched last spring and it seems like most people wrote it off on the spot and at least in my opinion, unfairly ganged up on Mark. At the time Pegasus was a $30 modeler from a one-man operation, so I cut him some slack, got the patch, and I've been happy ever since.