I was thinking the capsule would be airtight and sound proof, but it's not, so if you can't sleep through a little noise it's not a good choice. Most people tried to be quiet though. Also, there isn't much privacy in the dressing area, similar to a fitness club, but it was very clean.
Everything needed was there: toothbrush, toothpaste, pajamas, slippers, alarm clock, shampoo, conditioner, body wash, hair dryer, towels, small locker, place to leave large luggage near front desk, bathrooms near sleeping areas, and vending machine with drinks on 2nd floor. You can easily walk to the central shopping district of Kyoto and find public transit (Shijo/Kawaramachi).