I've been using Fruityloops for years now, and had pretty much ignored this plugin, thinking it would do nothing in addition to what I already had. It wasn't until the VSTi version came along that I decided to properly demo it, and boy was I shocked!
This has to be one of the warmest sounding synths I have ever heard, software or otherwise. It can produce everything from big room-filling pads to rich, rounded basses to cutting lead sounds. All this and a breeze to program to boot (this synth, along with Linplug's Alpha, would be excellent for the novice sound designer).
An effective filter and those solid Image-line effects add to a package well worth the $35. Only let down is that the documentation is a little lacking, although it is perfectly adequate.