" KOHLER K-3386-0 Rialto One-Piece Round-Front Toilet, White (Tools & Home Improvement)
This is the worst toilet imaginable. First, the reviewers above are right: this thing plugs up all the time and has to be plunged. Not good, but I can live with that. The real kicker is when (not if) the toilet seat needs to be replaced. This is usually a 5-10 minute job on most toilets. On this thing, it's a two-day project and will cost just under $100. You read that right! The nuts (threaded inserts, actually) are completely enclosed and inaccessible. The only way to get them out is to get a special hacksaw that can fit under the screw heads and saw them off (you DO have one of those special hacksaw's, right? Nope? There's another $15.) Then you have to order special proprietary inserts from Kohler (they don't come with the toilet seat). It's part #84999. Two crummy little bolt inserts with some other junk you don't need. Price? FORTY-SEVEN DOLLARS!!! Yep, you cannot put that new toilet seat on without the $47 (plus S&H) kit from Kohler (plus the cost of the seat) -- oh, and wait a few days for delivery. Some folks have yelled enough at the service rep and got Kohler to send them a kit for free. Good luck with that. For me, I will never buy Kohler again. Any company that continues to sell such unbelievable junk doesn't deserve your money. If you still want this toilet, just remember: you've been warned!'

-from Amazon.com under Kohler toilet seat

The same house has another problem toilet: a one-piece American Standard champion, but apparently an older model with an older flush valve. New flush valve parts are going to run me around $125 with shipping, which includes an adaptor to upgrade to the newer style flush valve. Insane.

Hope you had a good break from work and enjoyed yourself.