First off, the place is great for about 2 people. You could have one person in the futon bed and one person sleep on the sofa bed and still be cozy. Be warned that if you do this and have massive luggage, it's gonna be a bit cramped to walk around but that's on you as the traveler.
Second, it's a real cozy place to be in. The decorations were stylish and not season specific. Everything you need is always just around the corner.
Third, amenities were nearby too. We passed by a Lawson on the way to the house so you could always shop there if needed. Or a 7-11 like 5 minutes away.
Last but not least, M-san(the host) was really helpful leading up to our actual stay. He provided instructions on how to get to his place, and provided us with instructions on how to use the equipment in his place(washing maching, microwave and the like). He kept in touch with us on whether we needed anything special. He checked in with us a couple of times before we got there to ensure that everything is according to keikakku.
10/10, would stay again if I'm going back to Japan/Ikebukuro area.