Hi bridespark
Its lovely when u walk in, very impressive lobby, very big, the restaurants are fab, food is amazing and the drink is endless! Pools are big, very clean & well kept, they keep the place going with shows & entertainment which you can participate in or not as you choose.
Don't get carried away with the jacuzzi in the room, its very big but looks kinda odd sitting in the middle of the room!! The maids arrange the towels in the shape of swans etc and put little flowers around it each time they clean! You can also take the free shuttle bus down into Cancun and as long as you have your wristbands you can call into the other Palace Resorts hotel in Cancun and eat & drink for free too!
Re the price, ours was about 6k too and we had 8 days in the Moon Palace and a 5 day tour of the sights (from the Kuoni website). If you're just staying in the Moon Palace for the two weeks for 6k I would say its a bit pricey to be honest. Also unless you're big into sunbathing, then 14 days in the Moon Palace may be a bit long. Depends on what you're in to.
Hope that answers your questions but if not just PM me!