"When in Shinjuku, we stay at the conveniently located Hotel Sunroute Shinjuku. It's across the street from Shinjuku Station and a large shopping center. The rooms are small, as expected in the heart of Shinjuku. The bed was reasonably comfortable. The TV displays which floors have how many clothes washers and dryers in use, so you don't have to go up and down looking for available machines. The hotel is dated, but comfortable and convenient.
I checked our luggage with the front desk. This took about 45 minutes, due to a finicky app and a front desk that couldn't/wouldn't just write it up for you.
The breakfast buffet looked okay, but seemed overpriced, so we went elsewhere.
We'll stay here again as the location can't be beat for its proximity to the trains and shopping."