Based around the TV series of the same name created by Mel Brooks and some other bloke, the movie Get Smart sees Maxwell Smart (Steve Carell) promoted to superspy status to stop some nuclear weapons falling into the hands of some terrorists and being detonated. Along the way he is supported by Agent 99 (Anne Hathaway), Agent 23 (Dwayne "The Rock" Johnson) and a few slapstick gags here and there.
Sadly though, well for me anyway, the film was one big disappointment. The gags were cheesy, silly, some of them dated and the majority of the time - not funny. The storyline is pretty much the same as every spy film (including the comedies) since the birth of cinema and the cast is criminally underused, especially Dwayne Johnson who I'm sure was trying to prove that he could do other film genres besides action, sadly he never really gets any time to shine. In addition the end plot strand involving a brass band and a bomb seems very simular to the recent film Eagle Eye - not sure which came first just thought I would point it out. As well as this Carell, who I am not a big fan of, seems out of place as the lead/hero (perhaps he is the American Ricky Gervais!) especially when his character falls for Hathaway's who appears to be there to provide some sort of sex appeal.
On the whole; yes I chuckled a couple of times, once being when "The Rock" walked into HQ and then into a wall as I wasn't expecting it, the rest of the gags however are very poor and there is such a long break between them that it makes you wonder if they ran out of ideas. My advice for you is that you should watch it once, have the odd chuckle about it and tell friends etc that you have seen it, then leave it well alone.