Pretty cool-looking. Never heard of that one before, so had to look it up!
Seems like Opsistylis is an intergeneric between Rhynchostylis and Vandopsis. (Thought maybe Vandopsis was vanda and phal, but it's not. Synonyms for Vandopsis are Fieldia and Hygrochilus, neither of which I've heard of before either....).
That inflorescence looks great. How long did it take you to grow the plant before it bloomed?