The hotel is 5 minutes walk from Iriya which is only 1 station from Ueno station where you should use as your base to start exploring the city. Iriya is not the most vibrant part of the city, but it's close enough.
The capsule has a separate large locker where you can put your staff in and an adjacent capsule style bed. Once you arrive at the place, you'll get a big brown paper bag from the staff which includes towels, shampoo, conditioner, toothbrush, bath gel, and razor (only for men, I guess). There are restrooms every floor but baths are only on the 8th floor (for gentlemen, I guess there's another floor for women).
Everything is clean and well organized. The staffs speak good English.