Positives:
--Most beautiful lounge of any hostel I've stayed at
--Great views of Shinjuku
Neutral:
--Front desk service was alright, if at times stand offish.
--cleanliness (especially of bathrooms) was so so
Negatives:
--AC was not great and unlike capsule hotels there are no vents in the bunks, leading to what was a hot and stuffy night. I didn't use any blanket and I was still too hot.
--Mattress was uncomfortable.
--There are no lockers. Granted I've never had anything of mine stolen in Japan but it would be nice to have the peace of mind, plus lockers are standard in hostels anyway.
I'm glad I stayed here for a night but I probably wouldn't rebook. Many capsule hotels I've stayed in are cheaper, have better amenities, cleanliness, and working AC.