Goofy, entertaining, lacks power in the ending.

Rating: 7/10 (9 August 2018)

There are guidelines against stating the score in the body of your review, but given the Imdb's inflexibility, I have to say that Guardians 2 is possibly the most 6.5-star movie I've ever watched.
I remember how I complained about the ending to first Guardians movie having unrealistic physics. Guardians of the Galaxy 2 lets you know right away that it throws the physics out of the window, which frees you from having to worry about pesky things like realism and this creative choice appears to have been right one.
In combination with an overwhelming amount of colourful CG, the flexible physics at times made me feel like I was watching another Shrek animation, and it was not annoying like it should have been.
Compared to the first movie, the sequel turns up the goofiness knob quite a bit, and with it, also the funny knob. This movie is a comedy above anything else and that's where it shines. All you need is fun characters played by interesting actors, just doing their shtick.
Perhaps the most notable thing about the movie is that it doesn't have a strong central storyline. There is a main villain, but he and his plan do not really enter the movie until about half way. Instead, this movie has 4 or 5 stories and themes running through it almost side by side, which is completely fine and does not feel disjointed.
Unfortunately, the film went downhill for me in the second half, as prolonged action sequences were making increasingly less sense and the humour was replaced by conflict and forced drama. Also, if you think about this movie's value in the future, it's hard to ignore the amount of CGI used to make it and how bad it may look to the human eye 10 years from now. The costumes and character design are nice, but they are drowned out by fake explosions and monsters.
In short, this movie is at its strongest in its middle section, when it is having fun and doesn't think too hard about anything. The last third of the movie starts losing momentum and entertainment value.