Very gimmicky and poorly kept. Would skip entirely if had the chance or if you don't have other plans for things to do in Hakone. It was fun to discover all the different pools but their condition ruined the effect. The spa has a very run down feel overall: paint peeling, dirty floors, broken pieces of floor and pool wall, rust, grime and dirt stains on the pool sides. Things like the bathing suit dryer in the changing room don't work

A couple of things we were not clear about which could help others to know: Our favorite pool had a panoramic view (when not cloudy) outdoors. It's tucked away and an elevated walkway away behind and to the left of the waterfall pool. It's less crowded because not a lot of people know to seek it out.

You are required to walk around barefoot in the entire complex. Even on the elevator, even on painful and slippery Rock floors, even in the dining area which has food remains all over it. Don't bother bringing slippers. If you have accessibility issues and issues walking barefoot, don't go. There are stairs and painful/slippery floors everywhere that are not accessible without walking.

Hygiene is an issue. If you are worried about hygiene, don't go here. There is no set up to wash before dipping in the different pools, or between the food and pool areas, kids are everywhere. If you have kids, this is a fun place to take them.

The food and beverages inside the complex are pricey. Eat beforehand if you can.

There are storage lockets for 200 yen if you have big luggage. You also get a locker in the changing room included in the admission.

Bring a towel! It was unclear to us where we could get towels until it was too late and we needed towels.

Bring a bag you can hang to take with you into the pool complex.

The pool refilling "performances" are a staff member dressed in an amusing outfit, adding a few bottles worth of wine into the wine pool, milk into the milk tubs, etc. Cute but nothing worth noting. The pools have very little of the purported liquids in the water (wine, sake, coffee, green tea, milk); just enough to color the water a light shade. The slides are not very safe for large people, as the pool you land in is very small and shallow.