So I picked up the physical copy recently, due in part to being a completionist. I have multiple editions of some of the TROs because of how the content had to be changed due to the Unseen problem.

It seems some of the early printed copies had a problem with some of the later pages being stuck together because they weren't cut properly, and that's caused delays for shipping them to some of the local gaming stores here.
Thankfully my copy doesn't have that problem, but I can see why some people were annoyed by it. Also because initially it was advertised as being a hardcover but it instead a traditional softcover format. I don't really mind that since that's how all of my TROs are.
I think many of the aerospace units and some of the non-mech vehicles got some new original art, with some entries recycling art from the Recognition Guide series. Most of the modernized mech art is taken from these prior books, which creates the occasional weird problem.
If I have one nitpick about the Centennial edition, it's that the text is largely reprinted verbatim from the original TRO 3025, but without correcting some small basic errors even though it would be pretty easy to do. The Commando entry, somewhat infamously, has an intro date of 2463 and says it was designed specifically to compete with other light mechs like the Wasp and Stinger. But those entered service a couple of decades later, according to their respective entries. The Battlemaster and the Phoenix Hawk are both given intro dates in the 2830s (the beginning of the Second Succession War) but also described as having been in later service with the SLDF before the League fell apart. I know in the Battlemaster's case some later sources fixed this by changing the intro date to 2633, and the Phoenix Hawk was changed to 2568.
The Atlas entry likewise says it was the first mech to mount the big AC/20 and that it was commissioned just before the Amaris crisis, as a response to the Star League Council being able to double their local militaries. General Kerensky was concerned about their ability to outmatch SLDF heavy units. Problem is, the Cyclops entered service almost half a century earlier (2710) and also mounts the AC/20.
The Orion is kind of an odd case, as the fluff text for the original edition mentions the SRM-4 being mounted in the left arm ringing the medium laser, with two extra holes for coolant hookups. This is consistent with the
classic art, but the stat block and record sheet for the Orion put the SRM in the left torso instead, and this has been followed by every other tech source/RS published since. Some of the more modern Orion variants have visually added the SRM launcher onto the torso while keeping the distinctive "pepperbox" design of the arm (as in the updated edition of
TRO 3050), but the
art reused for TRO 3025 Centennial does not. This art was originally published in RG: ilClan V19 for the Clan Orion C Mk 2 model and the equipment for that model differs from the SW era version. The left arm is a more powerful large pulse laser. The entry for Kerensky in the
Legends supplement also uses this design for his famous Orion, although that's possibly an error.
It's nice to have a modern edition available, I just wish they'd been willing to fix some of the small text errors, in keeping with later revised sources.
