I had a problem with the check in machine, but Ryota was very quick to respond even though it was 7pm which was very helpful.
Location is very close to the subway which was convenient. Its a nice comfortable space for 1-2 people.
If you are looking to cook your own meals, the kitchen was a bit hard to cook in as there wasn't really a space for food preparation.
A nice little place for a stay in shinjuku as you're a bit away from the hustle and bustle.