I'm so glad that I've chosen to stay in Ibis Umeda Osaka.
Price is very affordable, it's HKD4XX to HKD5XX a night, even it's Japanese Golden Week.
It's directly linked to the huge underground shopping mall which is directly linked to the train station. Even it's on a rainy day, you can still get back to your hotel without getting wet. Just look for Whitty (the name of a shopping mall) then exit no. 772.
Besides the really huge shopping mall, nearby the hotel on the ground floor is the 24 hours Donki Donki and dozens of restaurants. Across the road is 7-11.
Room is small actually, but just nice for a single traveller. The bed and pillow is so comfortable! The hotel is clean too, staff is nice and well verse in many languages. At night after I bought some drinks back to the hotel and ask for some ice, staff immediately went to the restaurant and get me a full bucket of ice!
The only minor -ve thing that I can think of is, the hotel doesn't provide complimentary bottle water, but it's not a big deal, I usually go to 7-11 to buy 1 big bottle on the first day after checking in anyway. And thereafter can use the kettle to boil water and make some tea. Kettle is clean and quite new also.
In short, I highly recommend whoever comes to Osaka to stay at this hotel!