The first Transformers movie was a commercial success. At the same time it was not as well received by the critics.
Since it did well at the box office, a second Transformers movie appeared (Transformers: Revenge of the Fallen). While it did not make the money the first movie did, "Revenge of the Fallen" was a box office success. If the critics disliked the first movie they hated the second. Even the stars of the movie complained about this one.
Which now brings us to a third Transformers movie "Dark of the Moon" (does everyone else keep wanting to call it "Dark Side of the Moon"?). Already the critics are panning this film but it shot to the front of the pack while grossing $32.7 million dollars on its opening day. In this summer of many big movies, "Dark of the Moon" might end up as the biggest money maker.
One thing we know for certain, as long as it keeps packing the movie theaters Michael Bay will continue to crank out these action packed, amazing special effect filled spectacles with no (or very little) stories. They are fun to watch but do not expect your mind to be challenged.