It's nice to hear that people who can't find the original editions, will be able to obtain almost all comic issues that contained Transformers, outside of their own TFs comic.
Pity about the #138 being left off though, but hopefully they include the couple of pages as an introduction, to explain why the Decepticons just "suddenly show up" in #139.
When I bought #139, I had to hunt down #138 to make sense of it (and when I found it, I couldn't just browse through the issue to see if it did indeed have TFs in it, because it was a bagged issue, due to some freebie included - so I had to risk it and buy it).
Interesting to hear that it is a first volume, suggesting that IDW are going to reprint other GIJoe/TFs stories - maybe both Dreamwave and Devil's Due crossovers.
Although, I would have thought a complete Gen2 omnibus would make more sense... with the 5 GIJoe issues and the 12 TFs issues, all in one volume as a "complete" edition.