Just got back. It was great. Had a high bar to meet following the surprise success of the first one.
Spoilers for cameos/credit scenes...
Great nod to Stan Lee being a/linked with The Watchers.
Credit scenes:
1) Kraglin practicing using Yondu's arrow and accidentally hitting Drax
2) The Sovereign reveal a new birthing pod to create..."Adam"
3) The Ravagers who were the original comic book Guardians come together
4) A scene with Peter yelling at a teenage Groot who is playing a video game
5) Stan is left sat on a rock in space as The Watchers tire of him.