This is a stylish space in a great location close to Ueno station. The space is really clean and the bed was comfortable. The space is utilized very well, so my luggage fit well under the loft, but a note that if you have valuables you want to lock up, the lockers they provide are only big enough for smaller items (ie phone, wallet, keys..) The entrance to the main common area has a keypad, and the room for guests has a second one.
I brought my own towel, but just a note that although they will provide you one, I believe I was told there is a small fee, like 100¥.
They let me drop off my luggage early before check in which was convenient. I felt very comfortable here as a solo female traveler, and the bathroom area and showers are spread out and spacious. Some are gender separated.