Very smooth long runway. nothing like the teeth jarring runways in Russia. Very modern airport. Great ATC. No larger mountainous terrain. generally good weather. Handler completes customs info, and is done when fueling is complete. Slots required - Last trip fuel and customs were done quickly, and we just had to wait for our departure slot.
at least in a Cl601, you need to flight plan for routing over russia - neonn G349 marcc g583 mve. due to lighter winds than the more direct route. there is also another route you can plan, but this one works out almost 100 %.
you have to watch their hours of operations, as they are closed at night.
Sapporo works best for Shanghai , korea, hong kong, or anywhere in Japan. Khabo is still a better option for Beijing.( it is on the direct routing)
anything else I think of I will put it up here again.