Last year, we went to the Grand Sunset Princess in the Riviera Maya, Mexico and it was our family's first all-inclusive vacation. We went with 2 other families with the same aged kids (6 adults and 6 kids, aged 1 and 4) and we had a blast. The resort was beautiful and we hung out by one of the kiddie pools most of the time. The desserts were consistently not great but there was lots of other good food including many a la carte restaurants for dinner, a beach BBQ at lunch, a sports bar, and a few buffet restaurants. The kids loved the kids club and my son still talks about it 10 months later.
We just booked another all-inclusive vacation from itravel2000.com. We are going with Sunwing again this year but to another resort called AZUL Sensatori. All the reviews on tripadvisor are very good. It's a 5-star resort 20 min from the Cancun airport. I am looking forward to getting away and enjoying the food which is touted as "gourmet".
We are going this year with one other family so there will be 4 adults and 4 kids (ages 5 and 2). I'm really hoping to get connecting rooms so that the kids can play together while we are in our rooms. There's an adult only restaurant so my plan is to take turns going there while the other couple takes care of the kids (good time to try the 24-hour room service). The kids club looks amazing. It has its own splash pad, water slide, kiddie pool, FisherPrice room, in-door rock climbing wall, gym equipment, video games room, etc... I've been reading all the tripadvisor reviews and watching all the Youtube videos that I could find about this place. I even started a list of things to pack. Can't wait!!