I went there a few times with a group of friends. This is a good pool party in Vegas. The club is pretty small and mostly plays Hip/Hop music.
First, the place is located inside the Venetian hotel. Parking will be easy, but the place itself will be difficult to find since you need to walk a lot to get there.
Once you get there, the line is actually rather short, but be ready to spend a lot of money. The cover and the drinks there are rather expensive. The pool itself gets pretty packed but that's always a good excuse to talk to random people.
Unlike other pool parties in Las Vegas, you can actually find quite a bit of shade there, and it is actually possible to seat somewhere without buying a bottle/drinks. The main problem with this place is security which is extremely aggressive and will not hesitate to push you around/scream at you if you do something as insignificant as standing in their way because you didn't see them coming.
Overall, my experience with Tao Beach was rather good and I could recommend it even though this is not the best pool party in Las Vegas. Feel free to message me for any additional details that you may need!