Very quickly becoming my favorite hotel in Vegas. I went on opening night and thought it was a bit overrated. It looked really cool, so I've given it a few more tries.
When gambling, I've found that the dealers are the coolest. They have a sense of humor, and the floormen allow them to have fun with their jobs. Some other casinos get really strict about if I can be sitting or not, and touching some cards isn't allowed. I've done everything in the book that gets me yelled at elsewhere. Cosmopolitan just rolls with it.
The pool is obviously awesome. It is going to be the hot spot of the summer. And they drain the pool and have concerts out here... I saw Girl Talk and it was a great venue to be at, other than it was slightly windy and cold.
Oh, and they throw a bunch of different open bars and food events for FREE if you have a players card. I'm proud to say I got my players card on opening night and have a four digit number. That's pretty cool in itself, I'm like a founding member!
Also, parking is easy to get to off Harman if you want to avoid the strip. And walking distance from Citycenter if you happen to find yourself there.