Great concept, wonderful for solo travelers/couples. It was easy to navigate the web browser to open the doors; I think the people who struggled in previous reviews might not have explored the web browser thoroughly enough - they provide great instructions. Space is clean and tidy, just like the pictures. Only issues I had was that 1) the room was crazy hot - can't control that much with an old building and it being summer in August, but it was easy enough to manage as long as you kept the blinds closed and kept the fan going. 2) I specifically booked a lower room (because I knew it would be hot, and that I'd have a heavy bag and wanted to avoid stairs), and I was given a room on the second floor - which is halfway up when the levels are G, 1, 2, 3. As they have two properties for the area (the one I was in didn't have the gym, but I had access to the other building for the gym) I'd request to have a room there next time - they get less sun throughout the day just because of how it faces the street.
Their WhatsApp communication was great - they were pretty responsive and accommodating when I needed new towels, and attempted to find a different room for me.