I started with Poser 4, added ProPack and now use Poser 5 exclusively (since the last patch). My box says I was order #100 and I pre-ordered it the first available day. I still don't do much with the hair or cloth rooms and nothing fancy with the materials room. I do play with Serge Marck's tutorials for the cloth room and I'm learning...but it's a really steep learning curve for me. I also must admit that I've mainly done still pics and not animations with P5. I love the way FireFly renders--usually. Sometimes you get some weird effects. The main reason I use P5 exclusively is the ability to sort all your libraries into separate ones. Now, I can occasionally find the MAT file I'm looking for. (My new 128 gig external hard drive is already 2/3 full of Poser stuff.)