There's a ton of content in this book.
Steve Englehart's writing is great for the time. The highlight is the Kang War/Celestial Madonna Saga, but there's lots of little enjoyable bits and pieces scattered throughout the volume. There are some interesting developments surrounding Vision and Scarlet Witch, and Beast is a welcome addition to the team later on.
The stories are accompanied by some wonderful artwork from the Buscema brothers, Bob Brown and George Pérez.
Definitely worth checking out!