The folk spa was amazing, dipping in the lake with people skiing by on the frozen surface nearby was surreal.
The atmospheric, smoke, yurt sauna was gorgeous, so relaxing and not too hot for beginners, worth paying the little extra.
Its definitely a bit more basic than some of the most touristy saunas, like Löyly in Helsinki, so bring costume and your own towels. Recommend bringing sliders/flip flops as there is a little walk between things, covered in snow in the winter.