Note on accessibility: it's right outside Namba station exit 28/29 but *NO* lift/escalator, take exit 30 instead if you're lugging suitcases and baby strollers then (a short) cross the street.
Great location right above (blue) Metro Yotsubashi line and a short walk from JR Namba which is also the OCAT bus terminal to Kansai airport and other major destinations (such as Kobe, Kyoto, Itami airport etc.) It's quite a far walk (especially with suitcases and family in tow) from Nankai Kansai Airport train stop - so I'd suggest to catch OCAT to Kansai airport.
The room is very spacious with sofa (Deluxe Double Room, 1 King Bed) and large bath room with bathup.
Location is great, OCAT and JR and Metro is within minutes, Namba (underground) Walk is below, Dotonbory and the Osaka river is within walking distance.
The only thing to comment: the system only allows one room card access issued.
Oh, may I suggest Nanbantei (google: Nanbantei Namba) for a cheerful yakitory dinner with reasonable price nearby the hotel?