I received these Sorel's in British Tan about 3 weeks ago.  They are solid, have good support; great to use around the house and outside.  The sole is thick and feels so shoe-like that I have to remember to put on real shoes if I run to the store.  They don't scream "slipper", so no one would notice anyway.

We've been keeping the heat down to conserve energy and heating bils, so I wear them at least 6 hours a day.  Though the back is about 3/4" lower than I'd like, they stay on without "flapping" or making me hold on with my toes. I normally wear a 7 1/2 or 8 shoe so I decided on Size 8.  They slipped on so easily I was worried that the fluffy interior would mat down and I'd have a loose slipper.  Well, the interior has matted down, but they still don't fall off when I'm walking.  The top comes back far enough toward the ankle that they stay on even when walking up stairs.  I can wear thin socks which keep my ankles and feet warmer still.  Warmth was the deciding factor when deciding on the Sorel's.

I'm satisfied with the fit and the quality spot-on.  They're not as cheap as some of the other slippers on Amazon, but $55 for foot comfort that will last at least all this winter is fine.  If a good product is made, people will buy them.  In my book, they deserve the high ratings seen here.