Overall, we had an amazing time and will definitely be back. You can read what others have written if you haven't been, I'm going to cover just a few things that were surprising to us.
My job takes me to some of the top resorts around the world and while I'd put Desire Pearl's facilities in the 4 star range, I'd put the service up there with the best resorts I've been too. We had heard the service was excellent but were not expecting every staff member to not only be helpful but also totally invested in ensuring every guest has a great time. Rarely was any interaction not everything we could ask for.
Food was surprisingly good. Other reviews state that it's a bit better than cruise ship food. Maybe we've only had bad cruise ship food but this food was really much better than expected. Do yourself a favor though and eat food that make sense to eat in Mexico. For example, get the grilled Mexican food, not Rib Eye's (steaks in nearly all of Mexico aren't what we are used to in the US and Canada). Also, have the kitchen prepare your meal rather than grabbing stuff from the buffet. Also note that sanitation was excellent (I'm in Mexico approximately 30 days a year so I've seen it all) and the staff did a great job keeping the food fresh and clean. Pro tip: get morning espresso at the lobby bar.
Rooms were nicer than expected. In the pics they look dated but we had a suite and it was spacious, in good shape and felt more authentic than many of the ultra modern Vegas style rooms available in the area.
Average age: Average age was similar to what we see here in Oregon where most people are in their 40's or 50's. Being in our late 30's we were toward the younger end of things. We might try RM next year just to see if there's a difference. We found some amazing couples so we can't complain.
Advice: Get on the KIK group! We didn't and wish we had as it took us a day, especially as complete newbies, to get into the "swing" of things. Also, when people says that you'll be surprised you're comfortable naked they aren't kidding! I (the male half) had never been publicly nude and after the first day I did it and will never go back. Also true that it's less awkward talking to other naked guys than I thought LOL
More advice: Bring costumes for the theme nights! We only brought a couple and wished we'd have brought more. Also bring the sexiest dresses you can, my wife felt quite overdressed on several occasions, especially having been nearly naked the rest of the day.
OK, and here is for the people that are new to "the lifestyle" like us: Desire is the perfect introduction.
We had talked about this for years but never actually done anything. We got ourselves completely on the same page in advance and said what happens happens but limited to soft swap. We were both very nervous and sort of expected nothing would happen. Honestly, the situation at Desire could not have been better for people at our stage. At clubs it's just too fast for us as we like to get to know a couple before we'd be comfortable with them and we are quite timid about meeting locally as it's a bit more pressure than we like. At Desire, you can meet people in the day, with all your clothing off so everyone knows exactly what's what. Should you hit it off with a particular couple you can get to know them, go to dinner with them and actually get comfortable with them. Before you know it everyone is getting it on by the hot tub and your wife that's never been interested in women is suddenly pointing out beautiful women she thinks would be fun! Ok, can't promise that's how it will go for you but having had it work out for us I think it shows just what a perfect place it is for newbies to see the lifestyle in action and participate if they want. [add all other advice to new swingers here which you should have read by now ] If you are ready to take the first physical steps I can think of few better situations for it.