I had the UltraTerrains in load range E before switching to Ridge Grapplers.
I had absolutely zero issues or qualms running the UltraTerrains. They were a relatively quiet, and very comfortable tire. I took them snow wheeling at least 5 times and they did great.
I chose them over the Duratracs because I was looking for the Duratrac wet and snow performance without the Duratrac noise and wear characteristics. The UT's were/are a relatively new tire and I figured that Goodyear probably implemented improvements to it based on what they've gathered from the Duratrac over the years. Luckily, I found these tires to have met my expectations. They were some of the most surefooted AT tires in the rain that I've driven on.
That being said, some may look down on them due to lack of information/reviews on them, and because they are Discount Tire/America's Tire exclusives. TacomaWorld has a big thread on them if you want to read some real world reviews.
I went to the Ridge Grapplers for their size availability, sidewall strength, and aesthetics. But I do not feel as confident in them in rain or on snow as I did with the UT's.