I am demanding when it comes to slippers and require a few things in stone, before I will keep them. They need to be warm and comfortable and I want them to have a rubber sole, AND a foam, cushioning support on top of that.  Most slippers get one or two things right and fail in the other areas,  However, these slippers met all of the criteria:

-These are well made and are tall enough to cover your entire foot and heel
-They are fuzzy and warm
-There is a thin rubber sole with treds to accommodate quick trips to the mailbox or garage
-There is a layer of foam between the rubber sole and the foot bed, so they don't hurt your feet after extended use (majorly important)

A few points:
-I think all slippers are ugly and these are no exception, but you don't buy slippers for fashion
-Expect some heel-slip. I realized that my old slippers did the same thing, I had just gotten used to it. Unless you have laces, you are going to get some heel-slip
-Over the years, you will likely need a new fuzzy insert, as the fuzz starts to mat down
-Bought a 1/2 size down from my usual 9.5 to a 9 and I am glad I did.  I want a slipper to start off snug and stretch to fit (raw leather/suede does this very quickly)
-I did two spray coats of leather protector, you should as well

PS: These slippers replaced my old LL Bean "wicked good slip-ons", which I had for years (and loved).  I got a replacement pair from LL Bean and was really unhappy with the quality.  They had changed so much I couldn't believe it and returned them.  Searched Amazon for a long time, read all the reviews and decided on these EMU slippers. Very happy with the purchase.