I enjoyed this a lot! The thing that I liked the most was the choreography of the fight scenes. Amazing! I really felt like being there with them the whole time. The animation is gorgeous most of the time, except some moments when the CGI looks a bit blocky, videogame-ish, but it moves fast so you won't notice it very often.
Another strong point was how they managed to rewrite Broly's story and fit it in the greater Dragonball universe. I think they did a good job at explaining most of the changes added to the characters. A lot of great cameos. The new characters were also enjoyable and the creatures from Broly's planet were really interesting, especially his giat pet.
Satisfying climax. Of course, Gocku and Vegeta fighting together is always a pleasure to witness and the fan service is strong with this one. Also, Broly's transformation is just violent.
I didn't like some of the design changes for the main cast. Sometimes it felt a bit weird watching someone's who's supposed to be Vegeta not being very Vegeta-like. But it's ok. The animation is more fluent and so they probably had to adapt. Also, it felt like there were no real stakes. I mean, after seeing Goku use UI in the series it's hard to bring some guy and make him instantly more powerful, but again, that's just how Dragonball is.
Great movie! Thank you to all involved in making it!