Called Wentworth with a backup up toilet, and asked that they replace the 30 year old one we had. They came out the next day, checked the problem, and installed the new toilet within 1 hour. When the problem appeared again several weeks later, they returned the day I complained, made a couple adjustments at no charge, asked me to call again if the problem persisted. Everything has been good since. Too bad I don't get to deal with people like that more often. Very professional, very good.