I thought the movie had better visualizations of the kids powers.
Sunny's biting power was less cartoony in the movie, more like just an animal with a strong jaw.
The various books being pulled out in order to highlight Klaus's perfect memory was a better visual effect for his power that just knowing stuff as shown in the TV show.
Violet's power was more or less the same, but again, less cartoony in the movie.
I know its a cartoony show to begin with, its like me asking the looney toons to get more serious, but I just dont enjoy the more cartoony tone of the TV show.
One thing I did enjoy was the scene settings and color schemes, reminded me of Wes Anderson Movies.
I also changed my mind on NPH, after seeing him in the various roles and disguises, he does it more believably.