It was between the Uggs or Sorel. I went with the Uggs only because I trust the brand and I found most of the Sorel boots to be too fancy for my simple taste. I wanted winter boots that would keep me warm and were stylish; the Ugg boots were just perfect. My feet are super toasty even during -30 degrees! They are very comfortable. The only complaint I have is that they are a little heavy and I wish they were more lightweight.
I love that you can flip up the "collar" fur and make them higher. I read alot of reviews to go up a size and I went up by 1/2 a size and regret it. I should have bought a size that was a true fit. Try them out before you buy!
There is a newer version of these boots that have been launched by Uggs, called the Adirondack III, which provide more insulation.
I absolutely love my boots and would definitely recommend trying them out!