The outdoor onsen is the famous Kusatsu water. Fairly large. Not too crowded. The surrounding trees and bushes are relaxing. The staff maintains the onsen well.
The rooms are beautiful, and spacious. But poor design choices were made. The bright entrance light goes on by sensor. You can't stop it from turning on at night. The loud INAX toilet has a ridiculous flowing water white noise feature turned on by default at loud volume. You need to turn it off all the time. The sliding door clicks loudly when closing. Did the designer forget two people share twin rooms? The beds are surrounded by a raised low wooden platform. Beautiful, but non functional. It's awkward to sit at the edge of the bed.
The bus station and Yubatake are short walks away on sloping streets.