I own a pair of Sorel snow boots that I have had for many winters so I got this for my husband last Christmas.  I figure enough time has passed to write a review.
Pro - it is very comfortable and warm.  The slippers also look like they are sewn quite sturdily.
Con - unfortunately the inner lining does wear out a little quick.

My husband still likes it but it is quite worn looking.  To be fair, I'm in AZ so we probably don't even need that much fleece and he'll keep it for awhile but for those looking for sturdier slippers, it may disappoint.

I would probably rate them 3.5 considering their price point (the ones we got were over $50)