Me and my spent 5 nights at this place from Monday to Saturday. At first I just booked this place as I wanted to try how capsule hotels are like and the price. The location is excellent, less than 5 minutes from 25th exit of Nanba station and the hotel is directly located inside the Dotonbori area. It was easy to access shinsaibashi and nanba area. The room is definitely quite small, but spacious enough for me and my bags and personal stuff to fit in.
They give you a locker, which is quite small, but quite convinient and there are cameras in the locker area, ensuring safety.
The saunas were definetly quite aged, but good enough.
Only thing that was bad for me was that I could not eat or drink outside food here, when there are lots of great foods and drinks (such as breads and japanese beer or horoyoi) in Japan.
One awkard thing could be that there are female employees walking around, sometimes in spa area where you are naked.
In general it was excellent for 4000 yen per night. Would definitely visit again next time I am in Osaka.
Stayed July 2015, traveled with friends