The entrance is difficult to locate because it's in a foyer which is off street level.
It was a very good experience. Close to bars and eateries.
It is about 15 minutes walk from the Shinjuku train station. The express train to Narita airport stops at this station.
I would thoroughly recommend the hotel to anyone seeking a capsule hotel experience.

Does the job. Strange check in procedure, in which you put your shoes in a locker and then give the keys to reception and they will give you a different key for a different locker for you to put your bag and clothes in.

Capsule itself was obviously small - just enough room for me to sit up inside (I'm 5'11) you can also hear all the people come in and talking in the corridors. Capsule was clean and had a TV. Female floor was on the top level.

Common area was pretty busy when I got there, but had the basic amenities, vending machines, Sofas and eating area/canteen. The place also had a spa - if you've never been to an onsen before, read up about it and its very strict rules.

Very central position, without having to walk through the seedy part of town.

Tried this as a one night experience - I would only recommend this type of accommodation if you are on a tight budget. Otherwise, get an airbnb flat.

I stayed here on a solo trip to Tokyo in November 2016. In the heart of Shinjuku and about 15 mins walk to the main Shinjuku station.

Perfect for a solo trip

It was a bit hard to find initially. And you may walk past the pin on google maps several times before you find it.

Remember to take off your shoes as soon as you walk in.

More tourists who stay here than other the capsule hotels I have stayed at