Hi. I read a lot of posts here before I went to Cancun (11/24 - 11/30) and some were true and some were not. This makes me think many are by hotel operators, etc. that are tying to get people to come. If I'm wrong, I'm sorry, but there were definitely some false reports that I read on this site (such as the fact that the Riu Cancun was open, which it was not).
With that said, I am a true traveler (my day job is as a lawyer in CA) and hopefully people will find this report helpful.
As I noted above, I was in Cancun last week. My finance and I stayed at the Riu Palace Las Americas (being transferred there b/c the Riu Cancun was not open). If people want to see pictures of this hotel (the RPLA), look at any pictures pre-Wilma and take away a couple of the palm trees. Other than that, you CAN NOT tell this hotel went through a hurricane. It is beautiful, the grounds are beautiful and the beach is great. Plenty of room to walk / play, and the Riu Cancun beach right next door is even larger and fully accessible. While I'm on the hotel, the staff is great, the rooms are great (we had a wrap around balcony and three windows!) and the food was very good.
As for Cancun in general, it is NOT even close to 100% -- maybe 20 - 25%. All of the clubs that we had heard about were closed, and it did not look like they would be opening in the near future. If you are going to Cancun for the "club scene," I do not think this would be a fun time to go. We really enjoyed our trip, but the night life was pretty much non-existent. More than 75% of the shops we saw were also closed. We were in a mall (Kulkulcan Plaza) and the same was the case. We were able to do all the tours we had planned on, and they went over without a hitch. The people of Cancun we encountered were great and seemed to be in high spirits. We felt safe everywhere we went.
It was a little sad at times being there and seeing the destruction that Wilma caused, but we were glad to be there in general and it seemed like the locals were happy to have tourists starting to return. If you will be very bothered by seeing hotels in ruins, stores boarded up, etc., don't go to Cancun right now.
To be clear, we would go back to Cancun tomorrow in a second. Oh, we also spent a day at Isla Mujeres -- a lot of activities were closed, but it was a beautiful island and very fun to be able to circle the whole thing on a moped. I def. recommend taking time to go there if you visit Cancun.
Hope this is helpful -- I'll try to respond to any questions.