KELTIA  Well, from the description it seems nice but after running it a bit, the interface, even for a java app, is rather poor and more importantly, it does not support RAW files... If it is intended for professional users, it is a rather surprising misfeature.  
(Version 1.5.0)

KELTIA  I have the same problem with 1.5.2 & 10.4.11. My main gripe with this 1.5.x series is that while an installer is nice, 1. it has never been necessary before (the application can be installed as many others, with the mouse) and 2., more importantly, it is not relocatable anymore.

Sorry, I hate applications that install themselves only in /Applications, I use /Users/Shared for third-party apps.

This is seriously backward.  
(Version 1.5.2)

KELTIA  I bought Parallels even before the release during the beta phase, I was pretty much excited about it. It runs fine but in the meantime, VMWare released Fusion. I've bought it and use it instead of Parallels because it has SMP & 64 bit support (which is invaluable for me for FreeBSD/amd64 work). Although a minor point, SCSI emulation in Fusion instead of just plain IDE is very nice. Parallels has some serious catch up to do IMHO.  
(Version 3.0.5584)