Film was too long - felt it could've been cut...drop the parents for a start. Also some of the small bots again were too comical...and the CIA woman was just not needed - too many characters. Scenes seem to cut to action bit then quiet scene, then action bit then quiet scene - felt jumpy in places. CGI was impressive.
Felt like a combination of 1&2 put together...I still like the 1st movie and I'm happy with that.
SPOILERS AND A HEADSCRATCHER
Wash from Serenity is in it playing a schizo German assistant.
Optimus Prime gets his trailer at last!
Soundwave speaks and sounds just like the cartoon voice 
Quite a few Star Trek references - even the famous Wrath of Khan quote spoken by Nimoy.
How come Sentinal Prime (voiced by Leonard Nimoy) has parts like a red firetruck on the Moon, before he's even visited Earth to copy that form? I think you see him during a flashback with wheels on and is coloured red before his awakening. Need to check that one but may not watch it again anytime soon.
Oh dear - I'm a nerd posted this