I found it decent, but I thought thy could have gone a little deeper and been a bit more broad with it. Certain parts were hilarious as charged, but I think they could have gone a little more outrageous.
SPOILER:
Personally, I thought the sequence where Borat suddenly bags Pamela Anderson was the most shocking and hilarious part of the film. I've wondered how much of the movie is staged, simple because they had to keep the plot moving according to the script. The Pamela Anderson attempted kidnap scene was well done if it was just an act, but I can't imagine how Cohen avoided legal action if she wasn't in on it. She'd probably be more pissed that it was for movie footage, planned out and intentional, than if some ignorant smelly Khazaki had actually believed it was legal to join a woman in marriage against her will (as if she'd still be available for bagging if it was, lol).
I also loved Borat playing the "poser" while he tried to get a room at the hotel.
Borat: "What's up wit' it Vanilla Face? We need some place to rest our black-asses for the night. Only 2 pimps, no whoe's..."
Absolutely classic, I dunno how this guy writes this **** XD
On a side note, I think it was really foolish of him to actually name a country of origin. I mean, he could have made up a fake country and nobody'd be the wiser, like in "The Terminal" (Krakovia). After all, he's royally pissed off the nation of Khazakstan by his portrayal of one. Although, it was funny to hear in Entertainment Weekly that he appeared as Borat outside the White House, advertising the film while the Khazaki Prime Minister was visiting. I'd imagine such a thing would invoke an immediate hiss of "YOU!!!" from him.