The room is standard size in Japan, though the bathtub is a bit small. You can open a 28-inch suitcase in your room and still have room to move around. Yet when I first entered the toilet, it is a bit smelly, so I clean a bit on my own.
You can get different disposable amenities at the front desk, which is located on the 2nd floor. The sensor in the elevator can automatically detect the floor you are in, which is good.
The washing facility is wash+dry model, and you need to enter a password for the programme to start. For you, it is a protection. For other guests, you may need to ask the help of the staff so that you can use the washing machine once the programme ends. A coin laundry is located opposite the APA hotel, which is within 5 minutes distance.
Lastly, if you are using large suitcase, you need to take down a set of stairs. As the nearest Osaka Metro station Exit 7 does not have an escalator moving downwards.