It was ok. There was a lot of fan service. (Ok, it was mostly fan service.) But I'm a fan, so I appreciated a lot of it.
There was some good action and fighting, and like the other Deadpool movies, it was pretty funny.
There was not a whole lot in the way of plot though. They tie it into some other recent Marvel movies and shows, but there's not a lotta story.
Overall, it was enjoyable though and that's what counts.