After reading over the supplement, I can conclusively say the encounters are its best bit. From run-ins with maniacal creatures spouting gibberish and grand battles with wounded dragons, to polar bear races and starving killer whales, this read is filled-to-the-brim with great ideas. If you decide to run Icewind Dale: Rime of the Frostmaiden, each of the encounters within will make excellent additions to that adventure, and if you are building a homebrew campaign in a frigid northland, they can just as easily be dropped into your own world. I am certain I will use the wounded dragon battle in an upcoming session, it is too awesome to not steal!
The only improvement that could be made is the writing itself, but that comes with an editor and a sharp eye. Otherwise, it's a solid product.
You can read my full review here: https://www.rjd20.com/2020-
[5 of 5 Stars!]