It's a masterpiece. Plenty of open air and space. The toilets are kept clean. Free wi-fi. Check-in and information staff polite and friendly (customs may need more staffing for foreigners). Choice of restaurants and shops are okay. The only reason why Kansai did not develop as "the" Asian international hub is because the authorities did not close down Itami (an old domestic cramped and dangerously-near to-the-city-center airport) as promised. Because of Itami domestic air connections to this airport have deteriorated; train connections to Osaka also. The Japanese are using Incheon Seoul for transit instead resulting in fewer passangers. That is reflected in understaffing of customs staffs and vareity of shops at Kansai.