Had a great stay at SPATIUM KANDA with some critiques
Self check in was brisk and simple with extremely clear instructions from the host,
the room is large by Tokyo standards, and has all the amenities you need- the location is near to most major train stations as well.
On the negatives, the described "Queen" Sized bed is actually Two Single Beds side by side- so they tend to part ways over time when you sleep.
Also fair warning that I found the mattress to be stiffer than usual, and we had to add a comforter underneath to make the bed bearable.
Pillows are also smaller than average, I advise booking larger pillows in advance or to bring your own.
A major point is that the toilet is totally exposed by clear glass, with the WC visible to whoever is in the room, we used a cloth to cover it for privacy.
overall it's a place of great value, very large room size with great amenities, so if you can live with a very stiff bed and a totally exposed WC area- this is a good find.