Just received these yesterday in black size 8.5 and so far, so good. Shipping was quick (ordered 3/2/18, received 3/5/18). Color and overall look is as shown, which is good. Foot went in very easily, no issues with the zippers. I'm usually an 8.5 and fit was a little snug for my liking with thin socks (heels and toes hit right to the ends, snug on the top and sides of the feet), but it feels like they will stretch a bit (like one reviewer said) due to material so I think thicker (ie wool) socks will be fine down the road. I have a pair of the Columbia Loveland Mid Omni Heat in size 9 and it is a little too roomy for my liking even with wool socks. I've been wearing the Heavenly Slips around the office today (on carpet) and they are comfy, very light, warm, but I don't think they are as warm as the Heavenly Slips even though they apparently have the same 200g insulation, Omni-Heat reflective lining, and rated for -25F/-32C temperature. Similar height to the Heavenly Slips: I'm 5' 4", regular sized limbs, and the top of boot comes about 8.5" high from the bottom of my foot. Haven't tried in the cold/snow/rain/ice yet. Will update if any issues.

This review may get updated in 3 weeks. I own a coat with an Omni Heat lining, which is what drew me to this pair. I bought them for an upcoming trip to Finland. My hometown has had below freezing temps recently, so I have been testing their warming ability. These keep my feet so warm that they keep the rest of my legs warm. I cannot give it 5 stars because the pair I have may be slightly defective. The left one seems to fit tighter across the top of my foot than the right. By quite a lot. It's as though the seem was sewn too small. But if I don't zip them, then they are fine. I am not returning them because they are so warm. I'll eventually get another, better fitting pair. But these boots are amazing. The footbed is bouncy and like walking on a cloud. Yes, these are what you are looking for. They are what you need.

Holy cow, these boots are amazing!!! I wore them in Mammoth in 10 feet of fresh powder with occasional negative degree temperatures, and my feet were so nice and toasty! They're rated for -25 F and I believe it. I wore a single pair of wool socks and couldn't have asked for warmer feet. I even bought those little warming packets just in case, but I never even had to unpack them.

These boots were extremely comfortable, the soles provide good grip on snow and ice (I mean nothing will be perfect on ice except maybe metal studs, but these are good!), and the way they're designed, even if you walk in super high powdery snow and snow falls into the top opening, the bottom part (starting above the ankle) is tapered and the snow never actually falls into the area with your feet, and further, you never feel the cold where the snow is. I had snow pants with the extra powder layer, so if you're wearing regular pants you might feel it more on your legs, but I doubt you're climbing in 10 feet of fresh snow with jeans on so it's a moot point. The snow was so powdery and high that I couldn't even go snowshoeing, but I did attempt to do a hike wearing these boots, and I was sinking in to about my shoulders with each step. The activity was quickly abandoned, but I spent many hours exploring in the snow and ice, and these boots stood up to the task like a champ. I was worried because they're a tad shorter than what I originally wanted, but as I stated, the design removes the concerns I had about snow falling in.

I usually wear a 7.5-8 and I read reviews about people finding these shoes to be small or uncomfortable, so I went with a size 8. I rarely have problems with shoes, but sometimes I do find certain ballet style flats to be on the tight side until they stretch a little, so I don't think my feet are extremely narrow. It's probably the design meant to keep the snow out that some people find challenging because it feels tight slipping your foot in, but once your heel is all the way in, it's roomy and very nice, and there isn't any tightness anywhere. Obviously, everyone's feet are different, but I really love these boots and the way they fit! They say waterproof on them and I have found this to be true. My feet were 100% dry after hours of trudging through really high snow. They're also lightweight and kind of pretty, so you can wear them anywhere, from a backcountry snow hike to après-ski drinks at the bougiest resorts.

I just got these about 5 minutes ago, so I can't speak for the weatherproofing. I'm going to assume it's fine because I have only seen glowing references to it in other reviews. This is about fit, support, and comfort, from the viewpoint of someone who has a narrow heel and a wide toe, and also requires orthotics.
A+++!
It is extremely difficult for me to find shoes and boots that fit me properly.
I have a narrow heel and a wide toe.
I have chronic plantar fasciitis.
I have pronation.
I need to wear orthotics for arch support, to help with the pronation.

Seeing all of the negative reviews about the narrowness of the sizing, and the positive reviews about how the narrowness got better once your foot was all the way in and got better as you break them in, I opted to get a half size up to make sure I would have room for my orthotics.
These fit me like they were made for me. The half size up gives me just enough room for a 1/2 length orthotic. My ankle is supported, my heel isn't rubbing up and down when I walk, and I can still wiggle my toes while wearing warm socks.
These boots are so light that when my mail carrier handed me the package, I thought for a split second that I had been sent an empty box.
The insole has some support, and has some cushioning to it.

I hope this helps someone else who has hard to fit feet like mine.

This boot is really cute. I wear a size 12 Narrow and it fits pretty well given my narrow foot (I was just happy to find it in size 12! Thank you Columbia!) It does run a bit short. Usually size 12 fits perfectly but I would've gone for a 12 1/2 if it were available. They are still comfortable and feel like they will be really warm. The downside is the zipper on the side of the boot stops short from the top of the boot by about an inch so there's a gap where snow can enter if you are hiking around in several inches of snow. All in all a nice winter boot.