We purchased one Swash 1400 and then, two weeks later a second unit.  The deciding factors were: stainless steel spray nozzles, a “sittable” soft close lid, continuous warm water (no tank), a well-designed remote, multiple spray features and presets and a 3 year warranty.  Improvements could include an even more streamlined appearance and a slightly redesigned seat.  Although, enlarging the seat might result in the unit not fitting our Koehler toilet.