The four Manga series collected in this volume were originally directed towards an audience of TV-watching Japanese children between the ages of 5 and 10 in the 1980s, and it shows. Still, for what it is, it is very charming. This is a high quality reproduction of the original stories. Every chapter ends with a silly power-rangers-esque finishing move. The book itself ends with a heartfelt note from Ban Magami, the primary artist for all three volumes.
The real reason for picking up this volume is that it contains series that were not adapted for animation: Battlestars and Operation Combination, the final vestiges of Japanese G1 Transformers. Victory, Zone, and Battlestars all have full manga chapters (though Zone is printed in such a way that it is read left-to-right, to preserve how it was originally published). Additional "story pages" are given for each series, and Operation Combination is presented solely as a series of story pages.
Battlestars and Operation Combination are very short, sparsely detailed, and can be understood no better by reading this volume than by reading about the plot on the wiki. If you are expecting explanations for what Ultra Megatron is, or what Grandus's personality is like, you will be disappointed.