Just got back from this..
It's great. The stunt work and choreography is mindblowing. The locations (both large scale and the more intimate and claustrophobic sets) used for visual flare are mesmerizing. They really become characters themselves in the film. The story is obviously a little more clunky compared to the first film, but I was kind of expecting that. It's still got some nice touches to the story. As far as where they could possible go for the next chapter...
Spoiler:
Antarctica? Mars? Where the f#ck is he going to hide now that literally everyone is after him?? haha..
...so the story did take a bit of an unbelievable turn, so for that it loses some points, but overall it's a really good follow-up.
John Wick - 9-10/10
John Wick Ch.2 - 8/10