Not too worried about kids wanting to go to Six Flags since we have one not too far away.
I learned about this place from a friend and it turns out they just went recently, here's what she had to say...
we were at Key Lime Cove last week for the first time. We really liked it. We had a 1 bedroom suite - had gotten a deal through some online deal site (like groupon) for $99/night, then I upgraded when we checked in for $40/night more for the suite. The room was very nice, clean and large. Probably Hilton quality. The waterpark was perfect for the kids. 6 yr old wasn't quite tall enough to do the biggest slides (2 body slices, 2 tube slides and a "toilet bowl" one - that's what we call them), but she was fine with a giant climbing playground with decent-sized slides, the lazy river and wave pool. 9 yr old was well entertained for 3 days - the slides go out of the building, so they are bigger than "all indoor" ones. There is a hot tub in the middle that is parents only where you can have drinks and watch the kids on the slides. There are TONS of lifeguards, and all of the tubes on the lazy river/wave pool are clear. There is only 1 entrance/exit, and you have to have an armband from the hotel to get in (which is also your room key and how you charge things - very handy). It is salt water, so that is nice, too. There is also a huge arcade, lots of shops, a full resort of activities. Great for a long weekend. We did Wed - Sat. It was filling up on Friday night and we didn't swim on Sat, so I'm not sure how busy it is on the weekends. It wasn't very crowded 2 of the days we were there, and Friday it was busier, but fine. We plan to go back. They said they could accomidate allergies in the restaurants, and we only tried the quick-serve pizza place. There are tons of restaurants all around there, too. It is right by Gurnee Mills Mall.
Sounds promising