Hello there,
I've used Proshow Gold, PTE and my Apple iMovie to create slideshow. My choice and decisions.
IMO:
==============
PTE versiion 4.48 =
PRO - Simple to use and creates a simple exe file that plays right away and affordable.
Con - No quick solution to convert to DVD but it was possible to do. I did not like the interface.
I use PTE 100% of the time to create all my slideshow to run on PCs
==============
ProShowGold
Pro = Simple to use, Great choice of output from one file creation = Do it once and export to DVD,VCD, Web EXE etc.
Cons = Expensive and I hated the export to EXE format and the required plugins.
I only used ProShow to create the cool effects and convert to DVD. (This meant I had to rebuild my slideshow again synced to music - what a pain.) I use Proshow gold only 5% if I need to convert to DVD.
===============
Apple iMovie
I only use iMovie to create my DVD when PTE and ProshowGold can't do it for me.
Con = Slow proccess and I would have to rebuild my slideshow again. Limited functions to customize slides.
================
PTE 5.0 beta
Pro = Looks like everything I was looking for. Simple and straight converstion to DVD. Just want I want in a app. New special effects - and simple to use.
Cons: Still in beta and Still got some beta bugs

I can't wait for this to go GOLD. Everything I need to do at this time. Perhaps a new feature request!!! - Export to Flash.
Regards,
Bob Yuen
www.byuen.com