For Legion fans, this is the book to have.
What more do you want in a classic Silver Age Comic? Superboy meets 3 teenagers from the future and they ask him to join their team, and thus a legend is born! Not only is this just a fun book to read, but I would consider it a key book to own if you are a Legion or Superman collector.
Personally, this would make a great script for a Smallville episode - take the time to read this book if only for the quaint dialogue, the fun classic Superboy story, and the general collectablity of the book. Long Live the Legion!