Shu's apartment is in a very convenient location, which enables you to be able to walk to most of the locations in & around Shinjuku. The bed was also very comfy :)
As we were quite close to some of the main train stations, it was a bit difficult to get to sleep at night due to the noise. The couch and pillows were a bit warn and uncomfortable. The room also had a slight damp smell, however there is an air purifier in there.
Shu's apartment is a good spot to rest your head at night if you plan to do exploring/sight seeing throughout day and/or night.