Instruct: Classify an Amazon review as either positive or negative.
Query: timpani duet with only one timpanist

I love Philip Glass and his music, but as a timpanist, I am a bit dissapointed in Evelyn Glennie and Jonathan Hass. The two do not play well together, and I feel that one was a much stronger player than the other. I am assuming that Evelyn Glennie was the weaker of the two because she is a percussionist and not strictly a Timpanist like Mr. Hass, although I could be wrong. I have seen Ms. Glennie live and she is an amazing marimba player, so she can perform. But one set of timps sounded thin and I even heard some rim shots. I feel that this should have been recorded with two professional timpanist, that play every day, just timpani. It would have been a real treat if one player was Duff style and the other Goodman style. It seems this album was trying for some kind of commercial appeal by choosing Glennie.