It held ice for 4+ days in 100 degree F temps in the desert SW, and kept the food and drinks inside cold. Also used on a two week road trip to northern Rockies with it in the back of a pickup, bouncing around the bottom of a drift boat, and carried to music festival and it worked fine with no durability issues or signs of wear.
This review was written in the old system and had content requirements that are different than reviews written today.