I'm just throwing this out there that I think the only major problem anyone I know has ever had on a vehicle that would have been covered by an extended warranty was rusted and leaking fuel lines, which was only around $500 to fix. This was in a Pontiac G5 with 110k kms, so typical GM in a snowy area. Other than that everything has been normal wear items; brakes, old spark plugs causing a CEL, etc. and likely not covered.
Are suspension items typically covered? I could see that being useful if a strut decides to leak after a large impact or something.
I think the problem with extended warranties, to me, is that the coverage doesn't stretch long enough. You're most likely never going to use it in 84 months or by 85k miles. It's after 100k miles where age starts to get to everything that's plastic or rubber.