It is a lovely place , clean and have everything you need in place. However it is a little bit tight for 4 person. We have no room left to walk around if you set up 4 beds. It is really close to honjo azomabashi station and could take you to Shibuya around 45 minutes depends on which train you take and how fast you walk. And about 30 minutes to Shinjuku.
The communication with the host is great. They reply fast and clear for every question asked.