A group of 40ish adults are wanting to plan an All Inclusive trip to a nice place in Mexico. Our budget is between $1500>$1800 total. one has seen the Moon Palace on-line and is in love with the place. i have read some good and bad reports, especially about the beach/swimming. Is this the place or is there some place better.

There are plenty of others to choose from. Here's a list to start looking.

http://www.locogringo.com/dynamic/all-inclusive.cfm

Hey Paublopep
There are many nice places especially in Acapulco..look at the travel Brochures and take a look at the acapulco princes, The Mayan, Camino real, or if there a bit much price wise the Continental Emporio Acapulco on the bay has an all inclusive within thet price range for sure..very beautiful and very nice..and in the evenings it is very lively in that area..

There are many great AI resorts along the Riviera Maya. Do you want an adults only resort???

Puerto Vallarta has quite a few all-inclusive resorts, various price ranges. Depends where you are flying from, if this might be an affordable option for you.