The building itself (at least the part you’re allowed to enter) isn’t particularly spectacular - it’s cold and drafty. But it’s worth visiting because of the gorgeous views from the balcony. You can see Lake Ashi from the balcony and if it’s clear enough, you can also see Fuji-San. On the day we were there Fuji-San was shy and hiding behind the clouds but as you can see from the photos, it’s still a spectacular view. Note - there are two flights of steps up to the balcony and I didn’t see a ramp or elevator for those who are differently abled.