We went to Atlantis (booked through ICR) and first impressions was - wow, it's small and has a lot crammed in one area. We eventually found 3 sun loungers together but I reckon an early arrival if you want a pick of the best. 2 of the 3 sun loungers were in the shade and one in direct sun - ok for us but if you have 3 sun worshippers not good. The slides were good but some had extremely large queues and you could wait up to 15 minutes to get on some slides - not good in the baking heat.
The big pool with wave machine was good fun but again, very very crammed full of people on inflatable rings.
Also, food is a rip off but it's what you expect at these places.
However.... they do have a private stretch of beach for Atlantis customers.
I think next year we may try Aqua Dream (sorry Michelle)

Justin