I studied sanshin under Saki Sensei for two years. Not only is she knowledgable about the sanshin and the music of the Ryukyus, but she's also a really fun person to study under. If I move back to NYC, I definitely plan on studying with her again!
I've been playing sanshin under Saki's tutelage for about 8 months now, and in a relatively short period of time I've gotten good enough that people compliment me on my playing.
Saki has perfect pitch, so when I make the slightest mistake when playing, she notices it right away, which makes me all the more motivated to improve.
Saki always teaches in a detailed way, from how to play the song on sanshin to the meaning of the lyrics (which often are in Okinawan dialect), and not only does she teach the songs but since she knows quite a bit about Okinawa you can pick up a lot about the culture, history, etc. I always look forward to an interesting and fun lesson every week. I definitely would recommend it to anyone who wants to learn sanshin!