I've been twice. It's an OK place to go, but to be honest it's horribly over-rated. Everybody says go watch the sunset, so I did at Cafe Mambo. It's a fake beach and be prepared to pay through the nose for drinks (same for all the popular venues tbh). Your best going to Sol Y Mar and buying your drink in bulk. Foam party was fun until kicking out time after which the foam has disintegrated into a slushy dirty mess. Stay away from the strip in San An. It's full of dullards and drunkards looking to grab girls asses.
But for all it's down sides it can offer some amazing nights. Best one I remember was in Manumission. Madonna and a few other big names were there. We were even allowed into the VIP area to have a nose. Huge night. Space was amazing as well with the planes over head. Sasha was playing if I remember right.