This is a lovely, slow-paced, and character-driven series. No major events are happening; the focus is on relations between people and their conversations. I believe it's crucial that you like these types of series to enjoy A Storm for Christmas. The people who give this series bad reviews was expecting something different.
Just because you loved Home for Christmas (same director, some of the same actors), doesn't mean this series is a perfect fit for you. It's not really a similar at all, as Home for Christmas has a lot more humor, romance and more "action", while A Storm for Christmas is best described as mellow, cozy and moving.
The series is heartwarming and made me feel sad when it was over cause I started caring so much about several characters!
It's a breath of fresh air compared to many new-ish Christmas movies and series with so many clichés. Not to say there are no clichés in this one; there are, but in a different way.
There are many great actors here from Norway, Sweden, and Denmark. Recommend not watching the series dubbed cause you'll miss the fact that they speak different languages and therefore sometimes misunderstand each other.
I saw another review here stating how strange it is that one character switches between languages. This is likely the security guard who's not a native Norwegian speaker (the actress is American) and therefore changes to English sometimes. I do, however, agree it's strange that it is never really mentioned why she does that for international viewers.
And yes, there is a lot of profanity! Scandinavians aren't very religious people.