I found it mostly enjoyable. The pacing is a bit weird at the start: the Happy Hogan scene goes on way too long and isn't funny. Once you get to the Logan-recruitment montage it gets more fun. Hugh Jackman did a very good job creating a new version of Wolverine and not just playing the hits. I appreciated that the story wasn't "Deadpol joins the MCU, fuck Fox!" but rather "Deadpool rejects an offer to join the MCU and saves the Fox universe!" Though they kind of have their cake and eat it with the Thor bit. The emotional stuff with Logan was pretty good and the ending worked pretty well. The montage of Fox behind the scene clips over the end credits was a great idea and quite touching.
The humour was a huge mixed bag for me because the constant "ANAL SEX AND BLOWJOBS LOL" stuff isn't really funny to me. But it got a lot of laughs from everyone else in the cinema so I can't say it didn't work. The fourth wall break stuff was funnier and quite clever at times: I liked the Chris Evans character reveal, Wesley Snipes just being there at all and Elektra not caring that Daredevil was dead. Nicepool's fourth wall break was probably the bit that gave me the best laugh. The line about Jackman having to do this until he's 90 too. I didn't really find the dog funny at all?
The car fight was good and the Deadpool Corps bit was fun, but the fight with the good guy group against Nova's group was hard to follow shaky cam nonsense. Was pretty disappointed Laura barely got any action: she gets one quick bit where she kills Jugganaut and that's it. For all its faults The Acolyte gave Dafne Keen a far better action scene.
Emma Corrin was very good. Nova gets a good non-jokey scene with Wolverine, but her death was pretty lame. Didn't really like Paradox at all: the performance was too silly and they should have hit the "he wants to kill the Fox universe because he's sick of watching it" nastiness note harder.
This isn't some huge game changer for Marvel at all, but it is going to make them a lot of money and encourage them to do a ton more movies where any character can just appear dead or alive and do wacky shit and I guess some of them will be fun at least like this mostly was.