You have what you pay for, no more no less.
The staff is really helpful and nice, the rooms are bigger than expected (I stayed in a room with 2 small beds) and not bad for being Tokyo. The shower and toilet are good and clean (but as it will happen if you are a big taller than the average Japanese, might have some problems with the roof or the door steps)
The beds are confortable and the location is really great, it's 5 minutes walking from the best streets of Shinjuku, 15 minutes from Shinjuku station and like 10 minutes from Okubo and Shin-Okubo station (two separated lines that you will probably use)
It's really close to the Shinjuku life but the noise doesn't arrive to you, enjoy being in Shinjuku without the noisy part.
You have supermarkets and decent restaurants really close.
Very good experience and definitely will come back