It's difficult for me to be objective about the stories collected in this volume. This Marvel Masterworks collection includes the first issues of the Fantastic Four that I bought, way back in 1967.
I had read mostly DC comics before then, and, instead of a review, I'll attempt to bring to mind what made this odd Marvel comic book with these unfamiliar characters so appealing to me and so different from the DC comics I was used to. The first Fantastic Four comic book that I bought, FF # 63, in restrospect doesn't have a particularly outstanding story. But perhaps that's what made it a good introduction to the Marvel Universe for me.
First off, the title of the story: "Blastaar, the Living Bomb-Burst!" in big letters on the splash panel. DC's titles just weren't as bombastic (couldn't resist), as this one. Also, the way the story starts off with action--something that I was to learn was characteristic of Marvel. Marvel stories often started right off this way, filling in the details later. DC stories tended to be carefully constructed, building up to the action.
Another thing about this story was the multiplicity of characters, not just the FF, but Triton and Crystal of the Inhumans appear, as well as two super-villains: the Sandman and Blastaar. The action scenes--drawn by Jack Kirby--were exciting and dramatic and used large panels. Sometimes only four panels to a page and there was even one full-page panel showing Blastaar. Visually, the book just grabbed me in a way that DC comics almost never did.
Next up, for me, was FF Annual #5, which took those concepts to even higher levels. It starts with a passed-out Susan Richards in Reed Richards' arms. Then it heads into thrilling action as the Human Torch and the Thing team up with the Inhumans and the Black Panther to battle a weird villain (The Psycho-Man). Plus, pin-ups of all seven Inhumans, plus a Silver Surfer solo story, plus other features. What did I care that something called Component Five in the first part of the FF story is called Component Four in the second part of the story? I was hooked.
For those not wallowing in nostalgia, this collection includes the two key stories that introduced the Kree to the Marvel Universe, with the first appearances of the the Sentry, the Supreme Intelligence and Ronan, the Accuser. FF#67 and #68 provide the origin of the character then just called "Him," who later became Adam Warlock. The collection concludes with a four-parter in which a "mystery villain" turns the Thing against the Fantastic Four.
Altogether, an outstanding collection, even without benefit of nostalgia.