I bought a license to this synth as soon as I heard the demo in my host (Cubase 4). It just sounds great: very warm pads, lovely FM like bells without becoming harsh, swirling arpeggios that give that instant old-school vibe I look for. I think the interface is quite hideous, but since I loved the sound I went for it.
Then, the problems started. The thing is buggy. VERY buggy. When I save my project, all the parameters switch back to the settings of the presets, so changing anything won't do you any good. Saving a preset and trying to load it back also doesn't work. At times it simply refuses to switch presets as well, so you also can't change sounds in that fashion.
It is also not exactly a new problem, but it hasn't been fixed yet, despite complaints from other users. Contacting the developer is useless, since they just don't respond. A shame, really, since this synth would have found a place in about any of my project without its silly problems.
So in short: try this synth, but wait for a bug fix before deciding to buy it.