Overall, this is an enjoyable series, but I do have two complaints.
The first is just a matter of taste. I am not a huge fan of the style of drawing used in this series. Far too many cartoons these days are regressing to this simplictic, childish style of animation. The stories, however, are good enough to help overlook this and the type humor in the show would likely not work as well with more realistic artwork.
My bigger complaint if in the depiction of Optimus Prime himself. There is no sense (at least where I am at, just finishing disk one) that he is in fact the leader of the group. Without Bumblebee calling him "Bossbot", and the history of the whole Transformers franchise, you would think of him as just another member of the group, and not a particularly major one. He is weak, unsure of himself, and is not commanding. As a huge fan of Prime, this was a major let down.
On a postitive note, I very much like the Prowl in this version, and Megatron, though just a head so far, has an air of menace that he lacked in the orginal G1 series.