Just walking out now, loved it. Big fan of the source material and the first film and this delivered basically everything I wanted from the sequel but with some caveats.
Some of the action gets a little too frantic for its own good and nothing ever comes close to the Church sequence from the first film but if you dug the first, the comics or Matthew Vaughn's style, you're going to lap this up. If you weren't a fan before, this won't change your mind. As a matter of fact, you'll probably despise this even more - its more of the first film but bigger, louder and crazier.
For me, 7.5/10. Loved it, just felt a bit overstuffed and sloppier in places compared to the tight, cohesive narrative of the first and Julienne Moore never quite hits the same heights that Jackson did but I still had a blast and I cannot wait to catch it again Thursday night. Definitely a great time if you're already on board with franchise.