Yeah, I'm not a fan. The animations don't add anything and end up wasting your time as you wait for them to complete. The fact that most of the tree is hidden after you click on something makes browsing annoying.

jqapi, on the other hand, is awesome

jQAPI is indeed a much better choice. The jQuery API browser linked to (which is also horribly out of date) has been "superseded" by http://api.jquery.com/