Transformers is one of those movies I had to see because I knew everyone else would. Sounds like a bad way to decide whether or not to go to a movie, but then again that's how Michael Bay makes 100% of his money. At Quality 16 on Huron:

Johnny Quest: You know this is just going to be like Armageddon with a worse plot and cast right?
Fanatic Friend: But it's Transformers!
JQ: It's also Michael Bay...
Girl Friend: I liked Pearl Harbor!
JQ: (sigh)
(Seven and a half hours later)
JQ: Holy Megatron that was long.
(Fantatic Friend is smiling uncontrollably)
JQ: What? Best movie of the year, right?
FF: You tell me one that's better.
JQ: I saw two this week that were better, one was a socialist documentary about health care and the other starred a cooking rat. Oh and I forgot about Die Hard, that was better too.
FF: You saw three movies this week?
JQ: Summer is boring.
FF: You didn't think the robots were cool?
JQ: Of course the robots were cool, but you can't just have a movie that's entirely about giant shiny robots crashing into each other!
FF: Why not?
(Girl Friend walks out of bathroom)
GF: So?
JQ: Meh.
FF: Awesome!!

And those last two lines pretty much sum it up. Longtime fans and Average Joe Moviegoer seem to love it, those who aren't so easily seduced by explosions and Shia LaBeouf think otherwise. Worth seeing, but try to sneak in so you're not giving Michael Bay any money.