Spent 6 nights in this beautiful flat and couldn't recommend it higher! Everything in it is of great taste and quality and had everything we needed for our short stay. Our check-in was super easy and we even found our favorite izakaya restaurant just on the ground floor.. owned by a really cool Japanese guy who prepares every single dish with so much love and attention to detail (note there's no English menu but he explained everything to us). If you can, try his delicious food with the Beau Michele sake (the best!). My only watch out is that changing lines in Shinjuku is not the easiest thing to do for first time visitors so plan extra time at the beginning for transfer.