I didn't actually realize that parasol up and parasol down were two separate locations....yes, silly me. But during my many trips to vegas in the past year (3 and counting..) I went to parasol up twice, and both times, the experience was a solid 4.5 stars.
The drinks are absolutely delicious, and creative. I love how subtle the alcohol is. The flavors and ingredients used in each drink enhances the flavors perfectly, and is never over powering. The lounge like atmosphere makes for a great place to just relax and people watch, or catch up with friends.
Half a star off because service can be incredibly slow, and its shame that such a fantastic lounge is situated right on the casino floor and opens into that. Not a big fan of the location.