First. It's a movie based on Hasbro toys, giant robots that transform. If you expect to find deep philosophical meaning in that, you're barking up the wrong tree.
Second. It's Michael Bay. Meaning that a lot of c.r.a.p will BLOW UP. Sure, a lot of c.r.a.p blew up in the first Transformers, so in this one EVEN MORE C.R.A.P BLOWS UP. There are so many explosions that I saw people's faces melt off in the theater. Literally. So, if your face is easily melted, don't watch this movie.
Third. It's over the top, stupid as h.e.l.l, and Shia Le Beef is an aweful actor. But robots look terrific, and Megan Fox is hot, and did I mention A LOT OF C.R.A.P BLOWS UP?
It's good mindless summer fun. P.S. Suck it, auto-censor :)