The movie was simply amazing. If you happened to read the Light Novel it's based off of, Volume 5, you might notice they skipped a few things, but were pretty much spot on to the source material. And for more flare to the movie, they added their own special touches just like the two seasons of the anime, which felt very much like Konosuba. And the scene before the ending credits was simply fantastic.
Perfect, no. Enjoyable, hell yeah!