I live on a pretty remote island off the coast of Maine. I spend my winter days on a lobster boat. It gets face-splitting cold, and then I come home to an uninsulated house. I bought these Nuptse Booties to wear around the house, as slippers. I needed something warm, and I also wanted a sole that would take me outside on a dash to the woodpile or the chest freezer. Additionally, there had to be a tread that would keep me from slipping down the stairs. I thought these would be a great choice based on the down and the sole.
The good: As slippers, these are ok. They are warm most of the time. I feel comfortable wearing them on the slick hardwood stairs. They seem fine to run out onto the porch in, though I have not yet experienced their "amazo-morph" grip technology, or whatever. Admittedly, they are not quite cozy-curl-up-on-the-couch-with-them-on like some slippers, but they are serving the purpose. They were true to size. And they're kinda cute. I like cute.
The bad: I got these on sale, but they seem to go for about 80 clams. For that, I feel I deserve more support around the ankle (these feel saggy, despite the elastic inside). Furthermore, they are not very comfy. I have noticed my feel feel tired after walking around in them on the hardwood floors. They should be more cushy, with some down or foam on the bottom. I stuck some insoles in there, but I feel like I should not have to based on the brand name and price. And sometimes, yeah, my freakin' feet are cold. I mean, come on! I'm INSIDE! Under a BLANKET! But OK, I admit it's nippy in the living room.
The ugly: Some people seem to wear these outside, as boots. That seems laughable to me. There is no support, they are not waterproof, and down does not insulate when wet. I would definitely NOT recommend purchasing these with the intention of using them as anything other than slippers or tent booties.
Backcountry as a vendor was great: best price for these ridiculously spendy slippers, and free, fast shipping. I look forward to shopping here again.