This is not the "classic" Airbnb - it's a hostel, but i would definitely recommend it. I really wanted to experience the capsule style of accomodation and I have to say it's really cool! We stayed in a double capsule in a room with four capsules total. Everything was clean and worked well. The reception is open 24 hours a day. There is a common room with a little kitchen (fridge, microwave, kettle, tea, coffee and milk, plus some plates, glasses and cutlery). The space has a really nice atmosphere.
The capsule itself was pretty spacious (we could sit up inside, it was wide enough for two people comfortably). There is this cool "technical panel", where you can control the color of your light and turn on an air ventilator.
Overall, a very unique and pleasant experience.