These are wonderful in many ways.

1.  They're really warm (see the temp rating -- great for our cold MN winters).
2.  Easy to get on fat, toddler feet!  This is a selling-point for me.  I usually buy my daughter wide shoes, and these are so easy to get on her chubby feet.
3.  Great for toddlers who are just learning to walk.  We got these a number of months ago when my daughter had only been walking for a short while and was a little tipsy.  She's close enough to the ground that she seems to be able to feel her feet well, plus her feet spread out nicely in the boot.  They've been great for this winter.
4.  They come in tiny sizes!  We got them in a 5, but my friend got some in a 4 for her daughter.  It's impossible to find winter boots in a 4!
5.  Big enough that there's some room to grow -- my daughter has been wearing them as she's been moving up the shoe sizes throughout the winter and they still fit nicely and are comfortable.
6.  We can wear them as a spring rain boot, too!
7.  Really cute design.

I loved these so much that I bought a similar pair for my older kiddo for next year, and I've been thinking about getting myself a pair.