I bought the Coverking neoprene covers for my Chevy Avalanche about 4-5 years ago to protect the leather in my truck. They have been absolutely fantastic and have never been hot in the summer.....even when it is 110 here in the desert....much better than getting into the leather sets.
I had Wet Okole seatcovers on my car when I lived in Maui and those are great.....really are but I see very little difference in the coverking product having had both.
I would and will buy another set for the new jeep in the next couple of months once I get done rehabbing the interior.
On a similar note you can order these from Costco on-line for your specific jeep and I found those prices to be $10 - 20 less than other sources and Costco includes the shipping.....not to mention that if you are unhappy FOR ANY REASON you can simply bring them back to your local warehouse and get a full refund with no questions asked.