A great sequel!

Rating: 9/10 (7 May 2017)

This high-energy sequel is hugely entertaining from the opening scene to the very end. Highly recommended!
This movie is very funny and, at times, ribald and camp. The real pleasure is not in the world-destroying, starship-battle action, but in the snappy, humorous dialogue and in the character conflicts. Chris Pratt and Zoë Saldana are sexy as hell. The soundtrack (yes, still based on Peter's Mom's 1960s cassettes) is uplifting and catchy. Even the other characters have adopted this music, and play it non-stop. At the end, quite unexpectedly, this movie becomes moving. Excitement, laughs, cheers, tears -- it's all there.
I think it would be a great idea to see the first movie before you see this one. Volume 2 brings back the winning characters, musical theme and formula from the first movie, so don't expect too many changes. Groot is still alive -- although he is a mere, um, twig. We see more of the Ravagers. A new alien species is introduced: the strange, perfect golden Sovereign. One important new character is introduced: Peter Quill's father. This movie is essentially about him, and all is revealed.
The film is worth about 8.5, but I'm rounding it up. Go see it!