Extended Warranties - Are they worth it?

I made my own extended warranty that pays for anything and everything I need done, including upgrades and modifications. The cost of the extended warranty was to be about $3000 a year. That would add roughly $250 a month on to the contract. Since my coach was new, I felt I could take the chance to not have any major issues not covered by the manufacturers warranty that first year. I opened a new savings account and had $300 a month put into it automatically. My coach is a 2006 and I have paid for all work including two King Domes and the Winegard Traveler to replace them both! I bought and had the Splendide Combo installed, I have had various minor repairs done over the years including new day/night shades, new water pump, and 6 brand new tires plus all my maintenance for the motor and generator and too many other small things to mention. In addition, I use that account to help pay for trips and special tours, even an Alaskan Inner Passage Cruise. I still have money enough in that account to put in a new refrigerator, new transmission, and new microwave/convection if they were needed. I have been religious about adding the $300 a month and I also put any "extra" money we get into it. For us, holding our own extended warranty account was well worth the money.