Great location, cleanly, accommodating and friendly staff. There is a supermarket directly next door, the Shinjuku metro line is 6 minutes away, and there are some tasty restaurants near by.
The only downside is the noise at night from other guests, and some piping within the building, which is honestly reflected and stated on their profile.
I was a long term guest and would recommend ear plugs (just in case) if you’re a light sleeper. Lastly, the beds are a bit stiff for my liking. Overall, I’d stay here again despite these drawbacks. Great value.