I recently visited Rain Nightclub at the Palms. My First impression of the night club was good. We showed up early in the night and were able to purchase VIP passes for upstairs away from the crowds. As the night drug on it soon became like many of the clubs in Cancun. Door people began to pack as many people in the club as possible. Thinking i was safe from the crowds was just an illusion. Soon the VIP began to fill up and it was crowded as the down stairs general area. The only place to escape was the "sky box" area where booth rental is very over prices. The music echoing and was hard to make out over the large crowds and arena style set up. Drinks were about average price for Vegas going for around $11 per mixed drink.
Rain is not bad for what it is. It's a place you can go if you don't mind paying a premium and love being in large, crowded environments.