i work at autozone, we sell Dayco's and the gatorbacks. they are both really expensive, so we dont sell too many of them, but they actually have 1 and 2 year warranties depending on the application. the crappy valucraft and duralast dont have warranties, plus, i've had multiple people bring them back b/c they snapped while or right after they installed them.
this isnt always the case with car parts, but for some stuff, you get what you pay for
even though i have a discount at autozone, there is some stuff that i will not buy from them, napa has always been my favorite place for car parts (i need to get a job there lol). i've never gotten screwed over by them like i have at other parts stores, i'd go there if i were you