It's nice to see the 2D hand-drawn animation again, even if it also has some CGI sequences from the beginning to the end. (where Clumsy, Panicky, Hefty and Narrator Smurf were camping)
Plus it is great to see Brainy and Gutsy sharing their lead roles, along with Smurfette in her supporting role.
Oh and let's not forget the other characters including Papa, Lazy, Hackus and Vexy (who makes a scene cameo near the end), Vanity, the evil wizard Gargamel and his feline Azrael.
The animation was smurfy, the story is really well adapted (even if it's slightly different from the Sleepy Hollow story, it had some few elements from it too) and the characters are great to see too.
So overall, I'll recommend this to those who are a huge fans of those adorable little blue creatures living in their small mushroom houses.