I booked this place as part of a discovery process in Tokyo, I had only 3 nights and I couldn't be more sad to leave, the staff there is truly amazing, very genuine and kind people, special words for Kira and Fuyuki, they take great care of everyone and interact amazingly, they should get paid double.
The common area is medium sized but cozy, not often busy, there is a kitchen with everything you need and different amenities.
The room is a bit on the smaller size but sufficient, has a good shower, toilet, mini fridge, TV and double bed, which was quite comfortable. Two windows to let some light in (although can't be opened much) and heating/cooling.
As an extra, they have great wifi which is not that common in Japan.
The only thing that comes to mind to improve is to replace the curtains with proper blackout blinds, even though it is not a ton of light coming in early it is sufficient to wake someone up if you are slightly sensitive to light.
Will come back for sure.