I'm pretty pleased with it. I wish there was a bit better way to audition the preset packs then just listening to the songs on their site, but the ones I bought seem to work well. I like the sounds, and they seem to be easy to tweak. The controls seem to be logical and easy to work with. Some synths it seems when I adjust anything it either does nothing, or completely f's up the sound.
 
In particular I find many of them to be, I guess I'd say, "under control" compared to some other synths. One issue I've found with Z3ta and FM8 are that so many of their presets are just wild. You press a key and it plays on, and on, and on forever. Like they are trying to pack as much in to one note as the engine will allow. Makes things not very playable.
 
Most of the presets here seem to just play the note you asked, and stop when you release. It is nice.
 
I has a happy with it.