It's trying to be a 4-op FM synth like the TX81z but it fails spectacularly. I've found it absolutely impossible to make a usable E-Piano or Brass sound. The operators do not work at all as they should. The AMP sliders should be controlling the FM modulation, but most patches have them all at 100% and they are hardly modulating each other. For that, I regrettably must give it a low rating. I'm surprised this got 3rd place in the competition. I expected something at least better than Uno FM, but it's actually worse. If you want a good example of a 4-op FM synth, see eFemme, Exakt Lite, or even Panzertank PM4 which was also made in SynthEdit.
That said, if you want weird sound effects, industrial or chiptune sounds - you might find something here. But this certainly can NOT do basic DX100 or Mega Drive 4-op FM sounds. I invite you to prove me wrong and upload some patches to KVR.