I say go for it. It's pretty unacceptably buggy in some ways. Both the hair room (collision detection) and walk designer are buggered up good, and I've had some probs with cloth room too (but I'm not sure if that was pre SR3 since I hanv't needed it.)Others have done good things with cloth though. Plan on using Poser 4 and 5 together because some things P4 still does better. And I've used dynamic hair effectively too, just don't expect collision detection to work. The reason to buy P5, is the AWESOME Material room. I have used high end apps, and I havn't seen a way to putv together shaders that is as easy (or fun) as the P5 mat room. The new render engine is a little slow but with tweaking is adequately fast and produces (potentially) much better results than P4. These new goodies come with some added complexity though so if you are a wuss about that stuff you may as well not get it. ^_- Personally I think it's a good deal at $100. Eventually Daz Studio may blow it's doors off, but since it's just an alpha now and will be pretty lacking in features off the bat, I'd go ahead and get P5 if I were you.