Just got back. We were there 12/16-26. Overall, it was a great place to stay (love seeing the animals, everyone was really friendly, etc.), but our 2BR was a disaster. I am going to post it in a new thread so I don't hijack yours.
Tips:
1) Definitely ask for a room close to the lobby. Hallways are LONG (like 1/4 mile or more -- not joking).
2) Check everything to make sure it's working properly. Lots of things were messed up in our room, which is weird to me since it was just remodeled in 2009.
3) We didn't do the pool (was freezing!), but hear they are great.
4) Definitely do Sanaa. It was awesome.
5) If you get a room with the giant whirlpool bath (not sure if in a 1BR, but definitely in the 2BR), the girls will love it!