Wet Republic is like the wild child of the Vegas pools that I've been to - at least at the moment.
Depending on the DJ and date, expect a small to long wait, especially as you come later on during the day when the main DJ is on. You'll have to go through several parts of security including a bag check and a patdown so do be aware. Can't bring in other liquids or gum either. There are lockers inside for $40 but just share it with the rest of your group to get the most bang for your buck.
Drinks come in two sizes for the most part. There is a giant souvenir cup for most drinks as well as smaller size. The bigger cups range from about $30-$40 while the smaller cups are standard club prices. In addition, there is food (at least for the daybeds) along with the daybed/tables. There is definitely a more private area for different levels too like the cabanas
The DJ is up on another level (covered if you're in the pool area by some of the tables) but the music is usually great from the Hakkasan line-up like Afrojack or Tiesto. The atmosphere is also usually very energetic. Expect lots of splashing as you get to the middle of the day (watch out for those electronic devices or drinks in hand). They also have towels available to the side.
All-in-all, it's not for everyone but I still really enjoyed the experience.