I have experience with all three Coleman, Yeti, and Engel.
I had a Yeti and the ice always melted very quickly over the span of a weekend camping trip.The Yeti replaced an old Coleman I had. The Yeti seems to be on the same par with a Coleman but the the Coleman was much cheaper. After the Yeti I bought an Engel and I can tell you the ice in an Engel cooler lasts the whole weekend. I come back home and many times I still have ice left. It is an amazing cooler.
I did a lot of research when I bought the Engel cooler and found out one of the biggest differences is how much insulation they use. This is the main difference from cooler to cooler. Engel uses 2" all around the cooler even at the bottom. Yeti hardly places any insulation at the bottom of the cooler and a large amount on the top- that does't really make sense since all of the ice in the cooler is on the bottom and the cold gets lost from the cooler sitting on the hot ground.
The Yeti is also hard to open and close with the rubber latches. you have to pull on the rubber really hard to close the thing putting alot of stress on the rubber itself. I went through so many latches in the short time I had my Yeti. I finally got fed up with it and threw it out.
Engel is the way to go - in my experience.
