Absolutely fantastic.

I have some Chinese classical music playing beside me, and I'm beside myself with the authenticity of this instrument. Hitting a couple of notes on my MIDI keyboard along with the music, and what I get is perfect timbre.

The GUI is very intuitive for intermediate+ users. There's plenty of expression in the layered velocity sensitive samples, allowing for MIDI mapping "erratic range" control (brilliant) and plenty plenty more to get you just the sound you're looking for. Very impressive quality. When they say "meticulously edited samples" they really freaking mean it.