This is a particularly sweet book. It is a particularly enjoyable return to the Starship Warden. Although the setting is revised from the original 1st edition, it is really easy to adapt in either direction. The rules revisions and expansions only add and take nothing away. Although I am more of a fan of the original 1st edition setting, the overall work builds on the strengths of the original.
The style of game might not be for everybody, however. Characters are quite flimsy in this setting - this is not new to Metamorphosis Alpha, however, so fans of the original should not be startled. Players who are over-attached to their character's needn't get this book, but if a fun death is as great as a fun life in a character for you, then welcome aboard (the wolfoids will love you).
New players should approach this game if they enjoy survival-type games (without the "horror" element), and are able to suspend disbelief (radiation produces not-quite-X-Man mutations, mutant badgers conquer plots of land, and a tree might well be the most cunning, vicious, and versatile villain in your campaign). If this is the case, then the game is nothing but fun from beginning to end.