The location is really good, Okubo (and Shin Okubo) is a lively district with a lot of restaurant and konbini. It is also close to the station and at ~20min by foot of Shinjuku (if you want to save some money instead of going by train). The studio is really small but it's enough for one person and it is functional.
The minus points are the bad sound proofing (you can clearly hear people in the next studios) and the cleanliness (the cleaning is done but it could be better).
I think the price is fair for such a convenient and functional place.