Is an extended warranty worth it ?

[flash]

I once had an extended warranty on a Mazda truck that was so called bumper to bumper and was not worth the paper it was printed on. I had axle seals leaking and called the dealership and they told me to bring it to them that it was covered under the extended warranty .I took a day off from work and they took the rearend apart and showed me the seals that needed to be replaced.They told me it would be $350 to fix it but that my warranty would repay me later after some paper work. I told them to put it back together as they had not bothered to tell me I had to pay out of pocket and then fight for my money back from whoever had the warranty. I then went into the parts dept and bought the $4 axle seals and left ,never bought an extended warranty again .