Hopefully someone can compare the printed book to the original TA pdfs. All I know is that it's a compilation with some additional racing material and that alone is not worth $25 to someone like me who has purchased and printed out the pdfs already.
So:
1) ground vehicles (TA3) - do they have proper vehicle data blocks now?
2) index - is there a summary listing of all vehicles that lists basic vehicle stats by size (vl), cubic meters, starship tons, weight (kg), and cost (Cr) ala TA3; a vehicle index with mostly different stats ala TA6; a plain index ala TA8; some mix of the above; or no index at all?
3) grav vehicles (TA6) - are the vehicle data blocks correctly labeled and ordered now and is the other errata in the pdf version fixed now?
4) new material - are there any new vehicles, adventure seeds, rules, etc. not found in the book not in the TA pdfs aside from the mentioned racing material?
5) updates to the pdfs - will any such changes be updated in the pdfs? At the very least any fixed errata? Considering that the pdf TA1 *still* has yet to be updated (any errata fixed, new material from the print version put in, and a proper printable version released) I am not expecting this to happen.
As for the water vehicles supplement (TA8) I haven't looked over it enough / had to use it yet in game so I am personally unaware of any issues with it.
Casey just looking for One Divine Hammer