I went off to see Guardians of the Galaxy 2 yesterday.
Unfortunately, I have to say I was pretty underwhelmed. I didn't think the story had much narrative push to it, and was a bit silly even for a silly, not to be taken seriously, comic book story; there was one sequence which reminded me a little too much of Tarantino trying to make mass slaughter cool; baby Groot was too transparently cute; and the look of the film really moved into CGI overload, if you ask me.
It's not terrible, but in a way it reminded me of the second Men in Black film - not a great story, and not enough original elements to make it feel like it wasn't just trying to get more money from its audience. (Although I think MIB2 was more enjoyable than this film.)
Perhaps number 3 will have a better story and script? MIB3 did...