We had a private 2 person soak in early January/winter for 2 full hours and loved every minute of it. From the excellent water and temperature to the perfect playlist, music level, and vibe, this was an awesome experience. Not quite snow on the ground, but a nice crisp air in contrast to the perfect temperature water.
The bartender, Miles, was perfect - just the right amount of checking in on us and offering more food or drinks and mainly just leaving us alone to soak. Beer/wine/kombucha and great food without having to leave the water.
A perfect two hour experience and well worth it. I hope this place stays exactly like it is, wood floor and walls, minimally developed (just enough), and a great vibe.
No idea how it is when there's more people there, but I imagine this draws a great crowd of people who are comfortable with it exactly how it is, and it's still fun and worth a visit during the open admission periods.