Sakura looks interesting. The sound modeling synths always look interesting.
It does look interesting, but I've tried the test release and it's quite difficult to get the sound you're really looking for. Frequency filters are odd and I'm not good friends with the way the program controls decay.
Also has bugs, some big ones too (for example, the synth itself doesn't respond at all to the FL-interface volume knob that should also be able to control it).
Might be why it's not available for purchase yet.
Not many presets, either. I didn't have problems like this with String Studio - that one had great sound too (maybe better even) and a truckload of useful guitar presets allowing me to instantly get what I was looking for while in the early stages of building tunes.