I enjoyed the water, which was soft and clear. It warmed me up very well. Both the inside and outdoor bathing areas were clean enough.
I just wish they rented the hair dryer for free ( as is often the case with hot spring facilities in Odate, it costs about 100-200 yen). I brought mine, but I couldn't even connect it to power. The entrance is cheap, though, so maybe I should not complain.