Just got Generations Wave 3 (Wheeljack, Thundercracker, Scourge and Kup). Let's tackle 'em in that order:
Wheeljack: When you open him, you will be in awe of his vehicle mode. Enjoy it, because you will never get him folded up as tightly again. Like Tracks, Wheeljack's back end is frustratingly hard to fold down properly, even once you know the trick to it.
Of course, the big difference between Wheeljack and Tracks is the legs, which have been remolded to make clear that the hood of the car is to face forward. The hood is a bit too wide for this to work however, and makes Wheeljack look sort of short and squat.
Despite all that, the colors are really nice and the tribute unmistakable. I still recommend it, at least assuming you like the character.
Thundercracker: By now, you know what you're getting with the venerable Classics Seeker mold. As with Thrust and Dirge, Hasbro has given us a truly awesome paint job on this one. My only criticism is that the same shade of blue is used on the missiles as the majority of his body, so they look a little redundant sticking out from under his wings in his otherwise excellent jet mode. I would have rather silver missiles or something like that.
Scourge: Wow. This guy is truly impressive. When this was first announced, I was annoyed that his alt mode was less G1 accurate than Titanium Scourge. But now that I've got him in hand I can say that this guy is light years ahead of that limited toy. Yeah, the alt mode isn't as accurate, but it fits the character, and is just flat out cool. Plus, for the first time, Scourge has a real transformation, and it's a fun one. Highly recommended.
Kup: The cream of the crop. Sure, the door kibble on his arms is annoying. But two truly sweet modes and a nice paint job more than make up for it. The transformation from truck to robot mode is downright cool, with a quasi-automorph quality to it. Transforming back to truck mode is a little less smooth, but it's not a significant flaw. Bottom line: this is an awesome figure, and if you have any interest in the concept you won't be sorry you purchased it.