Die-hard fans of the anime series will most likely detest this three-volume manga because of its rushed storyline and tendancy to edit scenes that are trademarks of the show. But fans who managed to get through or even liked the first two volumes will most likely find this third and final volume a fitting conclusion.
All the cons mentioned before are found here, as are the pros (I won't mention them again). But here are some new thoughts on this volume. It now becomes even more suggestive (to me, at least) that this series was a "version" of the Gundam Wing storyline, not a replication as many fans wanted. It is also most likely targeted to just fans of the series, for those not familiar with the Gundam Wing universe will most likely be confused and perplexed, even with the first volume.
Several changes made to the anime's storyline in the third manga volume were surprisingly good, and characterization also managed to creep in sometimes. Fight scenes tended to be a little short, but they were plentiful. Even the ending, although not consistent to the anime, was satisfactory for me. And, as before, the Domon strips in the back made me crack up and crack up hard.
All in all, the third volume compliments the first two nicely. As a series, however, readers can't deny that this manga didn't stay true to the anime (a sin to some fans). This series is worth it if you don't mind the rushed storyline and odd quirks, but there are definately better and more fulfilling manga series out there, including but not limited to: "Inu-Yasha", "X/1999", "Fushigi Yuugi", "Battle Angel Alita", "Neon Genesis Evangelion", "Nausicaa of the Valley of the Wind", and "Galaxy Express 999".
In any case, enjoy!