What did you Firefly fans think of Serenity?

This question revealed that a lot of jellies liked the TV show Firefly.
So, a couple years later the cast reunited and made the movie “Serenity”.
Did you like it?
What questions do you think it left unanswered?
Do you see a path forward for another movie, or the return of the series?

If you want to take this time and place to wax poetic about this show, go ahead.