Swash 1400 (Amazon), is everything it claims.  Easy to install.  Fairly easy to use.   I like the remote bracket with magnet instead of a hook.  The remote is daunting at first sight, but we quickly learned to tell visitors "just hit AUTO".

Already discussing another Swash for a 2nd bathroom.

I do have one criticism though, the "fit" options on the website need more detail.  One round bowl toilet, it's fairly short front to back, so the front of our 1400 sticks over over the edge.  We had to choose installing in other bathroom or living with the the imperfect fit.  It would have been nice to have more "fit check" tools, so we didn't go down the wrong install path to find out at the end.  Alternatively if the "roundness" of the rear of the 1400 could be a bit concave instead of convex, it would have left some fit margin for smaller bowls.