Best $15 I have spent (K-mart sale) and what I currently have. Used to spend $50-$75 on "Nice" 5 day coolers, but I'd always beat them up or leave fish bait in them for weeks + they would always turn ice to water in a day or two anyway. Now if I trash them I could care less.
If you open them every 10-15 min like I do it really doesn't matter how well insulated they are.
Unlike you guys I also don't go far from humanity - I have to drive 4+ hrs away to be far away from a store. NE is pretty well saturated with people and stores.