I got an engel cooler a few months ago. Finally used it this past weekend. Overall it worked really really well. Just left a bunch of food from thanksgiving in it with 2 frozen 1/2 gal milk jugs. Sat in the sun in the car for 4 days. I still had about 3/4 of the ice left and everything inside was cold. I'm sure if I was opening and closing it a ton, that would go to crap but for a weekend trip it'll make my old Coleman look like the POS it is. Last time I went to Windrock, I had to put ice in the SOB every day.
Also got a 13qt cooler/dry box. That is about the most useful cooler ever. Great for day trips, car trips, or going and hanging out at the park. I use it almost on a weekly basis.