We rode it a few weeks ago and were pleasantly surprised. It's definitely geared toward the 3-7 set, but it's a cute little ride with some classic Disney elements we haven't seen in a long time. Lots of texture, lots of transitions, very much in keeping with the sort of attractions Disney built once upon a time.
It's not a thrill ride, by anyone's standards, but it's a gentle journey with a Disney character and the technology at the end is quite delightful. We loved how Nemo (who isn't one of my favorites, sorry to say) and his friends went from being cartoonish to being in a Real Setting, then you went on to see real Nemo's and Friends. A great transition, IMO, and a fun little ride.