wheels are wheels..
there is no guarantee against no flatspots, coning, yellowing, etc..
it's like trying to claim a car that won't total after a major accident.
no matter what, if there is any error, amount of impact or however you want to compare it, shits gonna break/flatspot.
i guarantee you that.
your best bet is skate Bones, they flatspot less likely & will last longer than your average wheel.
although, i always support Spitfire, sometimes you gotta do what you gotta do.