Andy and I never had success importing cut files from other programs into our Path Trace, but I know others have done so in the past. Importing a picture to trace over works well, however.
Path trace works well on its own, as does its replacement (the product that comes their their new CMC s/w is just called TRACE). They're really not much different from doing it in a program like Corel Draw. It just takes a bit of patience to trace over it and make sure everything is joined properly. We have used all 3 in our shop, with the CMCs.