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I'm not super convinced by the water jet. It can make a mess, it requires a lot of paper to dry if you don't want to wet your pants and if you don't have soap, are you really cleaning?
Heating seat feels like overabundance (a common thing in Japan).
But the sink to clean your hands and reuse this gray water for the next flush is amazing. I think it should be made mandatory in every region with water resources issues. It's still not clear to me, however, if using soap there will cause more maintenance issues or not.
Fair enough, I may not have had the patience to find the right parameters yet.
Either way… water clean >> paper clean. If nothing else… use a wash cloth to dry.
Seconded, you can adjust the angle and pressure usually. I lived in Japan for 3 years, my ass has never been so clean as those 3 years.