I’m quite fond of their later vocal libraries, Mimi Page Light and Shadow in particular, but the entire Voices of Wind collection is pretty pretty good. Then, the even more recent Hyperion orchestral series, on which I hope they will continue to build.
Just checked. I must have over 30 of their libraries, and lots of them are quirky but interesting to say the least. Always made with dedication and professionalism. They are the other half of 8Dio from the days of Tonehammer and definitely the most interesting of both.