I bought the cooler a week ago.  I packed the cooler on Thursday morning at about 530. In it was a 15 pack of beer, 12 pack soda, lunch meat, cheese, fruit and veggies and dip.  All items had been refridgerated before packing.  Cooler was prepped 12hours before using a small bag of ice.

When packing I used same bag of ice and a gallon jug of water I had froze the night before.  I added a second bag of ice to use in drinks when we arrived at our destination. 

The cooler was in a topless Jeep the entire Jeep Jamboree.  We arrived home at 3pm Sunday afternoon.  Remaining drinks were still as cold as if they were in the fridGe as well as the food.  The cooler was kept in shade as much as possible.  There was still ice in the bags as well as the jugs.  Each day was around 90. 

Poor reviews on performance might be a faulty cooler but more than likely operator error for not comprehending the thermos dynamics of effective use of a cooler.