It's not only one of the best Transformers games out there, it's also one hell of an action game, with a unique theme, varied gameplay and lots of cool mechanics not present in other third person shooters. Though the story and execution are not be as epic as the sequel - Fall of Cybertron - the overall gameplay is still thoroughly enjoyable and well paced. WfC also offers a bit better vehicle sections than FoC, and way better and more challenging boss fights. Not to mention, being able to select one of three characters available for a specific chapter is definitely a plus.
People familiar with the Transformers will immediatelly appreciate the amazing animations and the artstyle faithful to Generation One, but the overall graphics are impressive on their own. One drawback I can think of in that regard is that it can be too dark/brown at times, with enemies being hard to distinguish from the rest of the environment. As for the audio, let's just say it's almost flawless, featuring some great music tracks, quite powerful sound effects, and an amazing voiceover, with numerous actors reprising their roles as familiar robots from the original show.
Still, even though the PC port is very much playable, it's quite lacking in many respects. From unrebindable controls, 30fps lock, minimal graphics options, to a complete lack of DLC, and multiplayer being full of cheaters. That aside though, it's still an awesome shooter, worth playing despite these drawbacks for the story campaign alone.