When I saw the first trailer I was rather skeptical about another animated movie made to promote celebrities through giving them voice roles and singing old hits all over again. I was surprised to see that it was actually very well done. The version which I watched was dubbed by Polish soap-opera actors, pop-rock singers and talent-show jurors so every worm got a celebrity matching their character and the arrangements of songs were very well done. My wild guess is that other language versions worked in a similar way.
The animation is fairly nice, with many background details and fantastically designed body language of the worms whose tail-gestures make up for the lack of arms.
The plot is very predictable, so I won't even try to spoil it. The movie reminds us that we should never give up on dreams, follow our heart, be proud of our children whatever they are good at, believe in ourselves and our friends, be able to express ourselves and not be posers. Rather typical stuff, but good to be reminded of from time to time.
A very good point of the movie is that it is suitable for people of all ages. Children will follow the simple plot, teenagers will laugh at the characters and adults will pick up the satire on relations between generations and the dull life of working people.
I recommend it to families with children and suggest some dancing during the final scene and credits.