OK, so no spoilers in this one.
In short the first hour of this movie is the best action movie I have seen since "Raiders of the Lost Ark". This is no small feat. The CGI effects were unbelieveable, the tension built very well. There was humor placed to break things up.
Excellent, excellent, excellent.
The robots started talking.
Everything you ever hated about the cheesy dialog from the cartoon growing up comes back. Optimus Prime is just a bleeding heart do gooder as his cartoon self. The dialog could have been pulled straight from the cartoon (was in some cases).
The second half of the movie seemed long. Lots and lots of action and AMAZING special effects.
Don't get me wrong, it's good, your kids will love it (my 8 year old was in ecstasy), but you will not be blown away.
Good movie, worth a watch. Not one I HAVE to add to my DVD collection.