I don't know if I'd be considered a power user, but I find myself using PP less and less as time goes by. I just find it difficult and clunky to use, because I'm so used to P5 now. I use it once in awhile; it is faster. And it's convenient for importing stuff to Vue. (Don't have to worry about which runtime something's in, because there's only one!) But if it vanished tomorrow, I'd hardly miss it. It's probably been weeks since I last used it. And I've kept Poser 5 open and running for days on end, and haven't had a problem. There is a slight memory leak, but IME, it becomes a problem only if you do repeated renderings with very large textures. All in all, I've found P5 (under XP) to be pretty stable. Much more so that PP under Win98 was.