Very well used, but equally well maintained. Bath layout and selection is well thought. The cold water bath might be a bit small in summer. Water feels outstanding for just a normal sento. One review mentioned that the water here was heated using wood which some people believe make the heat more gentle. I was not able to check the heating method here and the other thing is up to your opinion. Either way, it feels great here. There are some interesting tiles especially the forest ones around the cold water bath, but the only negative I can say about this bath is that it is not very aesthetically appealing. Not so beautiful, but other than that Koshin-Yu is a quality sento.