Go! was comprised of animated shorts packed in with toys of new mold Autobots and a new group of Predacons made from the prior dragon molds. Go! was a bit of a departure from Prime before it and was more like a Brave series. The animated shorts are available online and man I wished I'd had gotten some of the toys. Though I suppose I still can.
Transformer fan reaction was mixed as usual and as usual I loved it. Beast Hunters was the original working title for Beast Machines and that excited me instantly. While I liked Prime as is, this new direction appealed to me as it combined beast era with more super robot themes. The toys were really neat and I found myself liking the 'hunter' figures more so than the 'beast' figures oddly enough. The armor just made for a creative and cool toy that captured my imagination. While Wheeljack is my favorite of the group, that Bumblebee is a close second.