Super easy check in and check out service. G-Stays have someone at the lobby 24/7 (either at the front or inside their office door) so the whole process was very easy for foreign travellers who speak English. There is an elevator and also a flight of stairs, so perfect for people who are travelling with luggage. The room while small, is sufficient and has a good wardrobe space which you can place your luggage in - I probably wouldn't go more than 3 people per room, a couple would fit perfectly though. The place is located conveniently at exit A1 of Higashi-Shinjuku station which makes it super convenient to catch the subway to any of the surrounding areas (e.g. Yoyoji, Harajuku, Shibuya) and is a nice 10-15 minute walk to central Shinjuku.