I gave it 4 stars 'cause it's on the better side of 3. I thought it started out funnier than it ended - granted by the ending there was more of a 'message' angle to things, but I thought the quality of acting and the pace just seemed to lose it more towards the end. Could have been all the guest stars (Chris Rock as a Haitian/Jamaican cabbie? Winkler as.. who? etc). And while Sandler kept up his end mostly throughout, some of the supporting characters seemed too 'American' to be spoofing the Middle East - though some did the job well enough. The girl salon boss that he loves - she occasionally seems to forget her 'Palestinian' accent.. But whatever - it's not like you were taking this movie TOO seriously anyway, though I do think it could have been better had they played it a little tighter in some places. There are some good gags, though the gimmick starts to wear off a little toward the end as 'the message' kicks in. It's a fair enough message though I'll say that.
I wanted to see this movie and now I have. It's on the better side of Sandler films, most of which I've seen. I don't think it's better than some of the classics, for example "Bulletproof", "The Waterboy", "The Wedding Singer" or in his deeper fare, the excellent "Punch Drunk Love". I even liked "Funny People" more. But it is an interesting and original character in the Sandler catalogue all things considered. No, I don't think it's comparable to Borat, as someone mentioned - another great movie btw - though speaking of Sacha Baron Kohen, this movie Zohan may be of more resemblance to Kohen's "Bruno" which was TRULY hilarious - I ached from laughing so hard when I saw that. That movie however makes the crude humor in "Zohan" look tame (you've been warned!). All things considered, I'm not sure Zohan is really 4 star material, but if not then it's a very high 3. No need to tell Sandler fans it's worth a look. Zohan is an entertaining and decent movie altogether, but fell a bit short of its potential I thought.. to sum up in 3 words: it was ok.