PERFORMANCE: I installed the Washlet on my Toto Drake toilet about two years ago. The process took less than 30 minutes, and the seat is as stable and secure as the day I put it in.

The KOHLER Veil One-Piece Skirted Toilet K-1381-HC-0 measures 26.125 inches deep, 17.875 inches wide, and 21 inches tall. It's pretty compact, so it might work well if you're trying to save some space ...