The only things missing from Pro Pack are the hosting plugins (Lightwave, 3DS Max, etc.). Vue d'Esprit owners are having problems using P5's scene files. P5's Walk Designer (up through Service Release 2.1) is almost completely useless. Hopefully, SR3 will successfully address this. I don't have Lightwave, 3DS Max, or Vue d'Esprit, so those first two problems don't apply to me. Other than the Walk Designer, I'm having a blast.