For now (Jan 2019) you have to book a room to get soundwaves access, but that's changing in May or June when construction is complete. Right now only the indoor part is open, outdoor space coming soon. But while it's still relatively off peak, rates aren't too bad, especially for local residents, we get a discount plus Marriott points. I love this hotel and make a point to stay once a year, it's a treat for the kids especially at Christmas time, pricey but always worth it... Now with soundwaves it's even better! It's a clean, well designed space with lots of light and space. Can't help but compare to Nashville shores, the latter being much more costly and not really worth it in my opinion. Think soundwaves will be a real competitor to Nashville shores water park, especially once the outdoor part is up and running. You get a wristband that can be used even after you check out! The locker rooms are clean, towels abundant, lines for slides reasonable. Water is clean, lifeguards diligent, it's a contained space great for kids and adults alike, kids can't wandr too far out of sight. There's food and drinks and on top level, adults only area with bar and pool. Alcoholic Drinks come in a plastic cup though, which can be taken out of adults area. Friendliest staff, and it's so convenient to the guest room, you don't have to worry about lugging all your stuff to the water... They do have lockers for storage too, though, if necessary. My kids love it, ages 6 and 8. There's nothing, no ride they can't go on... Attractions include two lazy rivers (one slower, darker and with tubes,the other faster with awesome waterfalls,) about five good slides, surf wave rider pool, big kids pool with rock wall and lilypads, littler kids water playground. There's even a human heater you step into, and you're mostly dry in 30 seconds for the walk back to the room! Plus a shop if you forgot flip flops (yeah that was me), or anything else essential, that's typical hotel markup prices but not outrageous expensive. I've always loved the hotel and now have yet another reason to love it and go there. Didn't know what to expect but it's pretty awesome.