Visually, the game lives up to the look of the movies. I'll leave aesthetic judgment to you - the "Bay-former" designs are always a fun bit of controversy - though on a technical level, the game looks great. Characters have just the right amount of details and are modeled right off their movie counterparts. Transforming animations look cool, and there are a few neat special effects at play.
Environments are diverse; ranging from South American jungles, to a Sector 7 installation, to an icy Siberian missile silo. Levels are a little too linear, but are detailed. Some feature cool in-level effects like the frost effect in the missile silo.
Music and audio are in tune with the movie's soundtrack. Other than Peter Cullen, who voices Optimus Prime, I'm not sure if anyone reprises their role from the movie. Though I can't speak for the new characters, the returning ones sound in character with their movie counterparts. I was also happy to see that High Moon Studios found a way to get Nolan North some work -- poor guy needs it. ;)