It's nice to finally have a star of Arrested Development starring again in something well-reviewed (sorry, Will Arnett).  While others have gotten good reviews for their performances in otherwise-problematic movies and shows (see: Let's Go to Prison, RV, The Ex, Blades of Glory, 20 Good Years, etc.), Mikey Cera is the first to get a good review for his performance in a production that's also good since Tony Hale in Andy Barker, P.I.

And Mikey (and Superbad) is getting plenty of good reviews. Here's a sampling:

MoviesOnline.ca :

I finally saw Superbad. With a title like Superbad, one is inclined to rely on a pun involving the title. For example, if I was Gene Shalit or someone, I would say, "Superbad is Super-GREAT!". Or, "Superbad? More like SuperbadASS!!" Because I'm here to tell you something. It is that good. Superbadass, indeed. This movie is amazing. I can't believe how damn funny this is, and it never slows down. What Bourne Ultimatum did with action, this movie does with comedy. No, that's putting it too far. My claim that The Simpsons Movie was the funniest of the summer has just been challenged.

Arkansas Times :

Here's an endorsement: I've already seen “Superbad” twice. It's that riotously funny. It's also pretty sweet, in a way that teen movies usually are not, and tremendously foul-mouthed, so much so that it's a pretty safe bet that, despite its many redeeming qualities, your mom would not approve.

Cleveland Free Times :

 Still riding Knocked Up's wave of success, the latest Apatow production is set up to be a blockbuster monster - and for once, it's a film that actually deserves being prepped for this proverbial slam-dunk. We're going to go ahead and call it now: Michael Cera is the funniest actor in Hollywood. Although the 19-year-old Canadian is best-known for playing George Michael Bluth, an incest-obsessed high-schooler on the now-defunct sitcom Arrested Development, in his first feature role he displays a subtle mastery of physical comedy that makes it pretty much impossible to look at his face without completely losing it.