Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware of Kohler one-piece toilets

I've just gone through a nightmare simply replacing a toilet seat. Rather than the standard arrangement where the bolt and wing-nut go through the whole bottom unit, or the nut is reachable through the back of the water tank, many of Kohler one-piece toilets use anchor bolts that embed in the toilet unit itself. There is no way of replacing the seat without a special kit that normally costs $47.00. Kohler may be aware of the problem and now might give away a kit and a tool. A real hassle. Read product reviews on the Net about seat replacement.