You've already got the product. So the best thing I can advise is to download the last patch, apply it, and see how it works for you. If it works great, then use P5, but keep P4 intact (just in case). Its not like you can get your money back or any other form of satisfaction. I use P5 with SR2.1 and am relativly happy with it. Sure, there are still problems, but it is usable in a couple of major features which make it worthwhile to me, Materials and Setup. Both of these two features are getting used daily. The face room, hair room, and cloth room either have a bad interface that my eyes can't use (face), or are either too slow or buggy. I'm waiting on the SR3 patch to see if there are any improvements (if there is one). There are still problems with memory management, but that has improved a lot with SR2.1. As for the Beta Forum: Close it down. We get no news there anymore, most of the beta testers are discouraged, and while CL looks like its making a small bit of an attempt there, there's nothing new about testing or the new patch. I still check it once every couple of days, but its really dead on it's feet. I don't bother to report any bugs anymore since we have never gotten a complete bug list from CL, or a list of the things they're addressing in the new patch.