Our warranty wasn't worth anything and i would not buy one EVER again. If it's offered to me, fine, but I would rather save the money on the price of the house.
In 2002 we purchased a house with a warranty to find out the gas system wasn't working and the heater was completely inoperable. The system broke AFTER purchase and after inspections and a few days of use. The company refused to cover it since it was an old system and there was no easy replacement for it and they had no contractors in our county certified to do propane work. In the end we shelled out around $8K for a new heat pump and installation.
We reported them to the state and the warranty company said there was a default in the workmanship of the gas system so it wasn't covered. So, they would COVER the system in their contract, they just made up excuses so they didnt have to pay to repair it.
We tried to get the money back for the warranty but they also refused to do that.
When it came time to sell our house I said no way was I paying for a warranty for the new owners.
Meg