Booger, what would you like to know exactly? I know Rootswoman stayed in Avalon and really liked it but just like a Jamaicaholic would probably not stay in a all inclusive a Islaholic would never stay in the Avalon :-)
It appears my original post must have been purged in a DB cleanup since I cannot find it when searching all my posts.
We have been to Isla about 9 times and the last two years we stayed at Xbulu Ha
http://www.tripadvisor.com/Hotel_Review-g150810-d1225233-Reviews-Hotel_Xbulu_Ha-Isla_Mujeres_Yucatan_Peninsula.html
http://www.isla-mujeres.net/hotelxbuluha/
The contact person is Gabriel and he stays pretty booked up since there are only about 8 rooms all on second floor. But I think they now have a couple downstairs.
You have to walk about 4 blocks to the beach but the grocery, multiple restaurants, laundry, zocolo, melicon are all very close within a block. It is on a quiet street so you can sleep at night but not very far from the action.
I would highly suggest if you are thinking about going to get one of the Map Chicks maps as they are very helpful in planning with names of almost all the hotels. You can still get a nice room for about $45 a night in town above one of the restuarants or bars (pretty noisy at night sometimes though).
http://www.mapchick.com/
Just let me know specifically what you need Booger and I will try to help