My son and I each have a 55 quart and so far it has proven worthy. No way is it up to the quality of the seriously expensive units, but it is lightyears ahead of the usual junk coolers. A lot of the better brand construction "upgrades" work against you when the flanges make it too big to fit in certain vehicles. I borrowed several similar size better-brand coolers to test for fit that way, including Yeti and Orca. For $107 it was no contest as far as which one made the most sense.
Pre-chilling makes a big difference. Also, eutectic ice packs at the bottom do more than most folks realize. Because their melting point is significantly colder than ice. As water forms the colder packs refreeze the water to retain the latent heat value. It makes a big difference.
