Is my first time in a capsule hotel, so maybe my evaluation is unfair.
There are 2 very negative items that I do not know if are common to all capsules:
1- common area is charged 100yens per 15’, just to use a table and a seat (some free coffees are available as well). So, or you stay in your tiny capsule, or go to walk Maybe all capsules are alike... I do not know.
2-there is no place to seat at any place on lockers or bathrooms areas, is very uncomfortable to change yourself workout risking to get your cloth wet (as happened with my socks), put and take out shoes. Lockers place is very tight also.
About the capsule, bath and restrooms, they are clean, very organized and well equipped