I got some Duratrac intalled on the optional 18" wheels after only about 1500kms on the new Jeep. Noisier than the original Michelin for sure, but traction in deep snow (Quebec) like nothing else.
Having said that, I am just now seeing something weird for the first time. The noise level has been going up little by little. I just realized days ago that the wear on the front tires is uneven. I was able to identify (thanks to google) something called "scalloping" (?!). Never seen anything quite like it before. So here starts the troubleshooting phase... A handful of "reasons" are listed, just have to go through the list and see what caused this in my case. I will also browse through this forum to see if I'm the only one seeing this.
Other than that, Duratrac are noisier, yes - not for everyone, but will get you through holes where you can't help but wonder what the heck you are doing with such a nice machine !