i got an upgraded warranty for like 700 bux through avwg
got my money back on it in repairs for stuff
they arent that bad
u just have to service you car to their conditions (which are pretty reasonable)
that said, if you buy a good car (ie GET IT CHECKED OUT) u can probably just put that 700 bux to maintenance anyway and not be too far off ok
my warranty covered:
door locks failed, they got them all replaced for me
thermo fan cracked, i actually paid for it to be repaired by nissan, avwg then refunded me the money it cost to get it repaired after i wrote them a nice letter
and something else, which i cant think of now, never had any issues, i did send of my servicing coupons to them
aircon issues, including broken auto button got fixed under warranty
i asked about a few other things, and they were usually pretty helpful and told me whether they would cover it or not
some they didnt, some they did
really, as the end user its up to US to read the information they give you and use it to our advantage