I was skeptical at first when I opened this up.  I hadn't looked very closely at the picture, and saw the little dangling thing that looked like a zipper pull and the seam down the front, so it looked like it opened up to get feet in and out easily, but I found out differently upon delivery.  No zipper, you have to shove your foot in and pull it all the way out.  I had expected it to be a problem since usually that means the boots feel loose if it's easy enough to slide in, or if the boot still fits snugly, that means it's a real pain getting feet in and out.
This one is snug, but the foot goes in easily and comes out easily.  Draw strings on top to help keep a lot of snow from falling in if you're outside playing in the white stuff, can snug it up on top of the foot if you need, and they are surprisingly comfortable.  Feel very good and solid when walking around in them, and enough insulation to keep the feet from freezing.
So far, these are the best snow boots I've found in 25 years of adulthood...