Not a big fan of this ride (but I generally avoid the carnavelish rides at Disney, in that regard I avoid the Dinosaur seciton of AK altogether).
One of the problems I have with it, as others have mentioned, is that it's a very slow loader. Last time we went, we got in the line for this about 15 minutes after park opening and still had to wait another 15 minutes to ride (too much of a waste of valuable early morning park time for such a ho-humish attraction).
It might be fun at night, but I'm in the BTDT camp on this one.