The first two acts were ok, a lot more fun and closer to the Hunger Games of old.
There were some interesting visuals, but it wasn't quite as beautiful as the original films.
Despite it being a fairly long film character development was rushed in a lot of cases. I haven't read the book yet, so not sure if there was something I missed.
The third act is an absolute mess, where character motivations changed for no apparent reason. It was enjoying the movie up until this part and it was just a weak ending overall.
Take it or leave it, if you're a fan of the series you might want to check it out.