So hard....we went to Volcano Bay last summer. It looked amazing! My kids liked the wild slides...BUT we stayed at a Universal Hotel and were eligible for early entry. If you are not eligible for early entry, I'm not sure it's worth your time. We did about 9 slides during early entry (1.5 hours when we went). When the park opened at 9, we hit the TAPU thing and got a return time for the aqua coaster which was 1015am. We entered the line through the handicapped access point which jumped us up about half the line, and we still waited 1/2 hour to ride. After we got off the ride, the closest return time for any slide was 3 hours away. My boys went into the wave pool which was INSANELY crowded, so after about 5 minutes we left around 11:15 am. We had planned to spend more time there, but it was simply so crowded it was not fun.
This year, we are going to try the early entry again and I bought an express pass which is good for one time on each slide. You don't head to the front of the line, it just allows you to enter the line. We are going 7/31. I'll try to remember to report back. Feel free to send me a pm if I don't and you are looking for info. These express passes are stupidly expensive and limited in number sold. When I bought them, I didn't realize that it wasn't a front of the line pass.
I guess my opinion is that it is a beautiful and fabulous park...but until they get the capacity under control, it is only worth visiting if you have early entry and an express pass. I think you can have a more relaxing day at the WDW parks. It depends on what you are looking for.