This movie is a fabulous watch. Yes and it's even better than "The Office". Great characters and great performances. Very entertaining. The central character is a very likable yet delusional idiot. The story also needed good solid supporting characters that needed to be subtle. This is exactly what the director managed to supply. Just think of how the supporting characters in "meet the parents" were so important to the hapless Greg.
Steve Spielberg proved with his wonderful film "Duel" that a great movie does not require a huge budget. "Flim" has been made on a low budget. This proves that a good story well told (screenplay, acting, directing etc) is all that is required to entertain. "Flim", "Duel" and many other great stories don't need massive budgets. This is called responsible movie making (roughly quoted from Spielberg) and is as important a part of making a movie as writing a good story/screenplay. By the way the music is good too.