Last time I was in Tokyo, I stayed at Akiba Bay Hotel, which is a new capsule hotel, just a short walk from Akihabara Station. You are not allowed to take photos inside the hotel, but the layout was similar to the capsule hotel I stayed at last year. Akiba Bay Hotel is women only, and everything was very pastel-colored and cute.
The common bathrooms had individual shower cabins and a nice grooming area with all the amenities you could possibly need including lots of beauty product you could use for free, and the bathroom and toilets were kept impeccably clean at all times.
You had to be out of the hotel between 10am-5pm, which was quite a challenge the first couple of days, when I was still jet-lagged. During the time, they cleaned the capsuled, and when I came back in the afternoon, there was always a bag with new slippers, towels and a toothbrush waiting for me.
In the capsule area you had to be quiet, but there was a lounge in the basement where you could hangout and talk. The lounge also had a vending machine and a dining area, so this was where I went to make phone calls home and get some blogging done.
I really like capsule hotels, especially when I am traveling on my own. I am usually out in the city during the day, so I just need a clean and comfortable place to sleep, and a capsule is just perfect for me. Akiba Bay Hotel is the nicest capsule hotel I have tried so far, and I would definitely want to stay there again in the future.