This movie is a comedy Classic simply put.  You'll either love or hate the Monty Python humor, there is no in between.  I'm sure everyone is aware of the plot, and that it's them making fun of the medieval times and king Arthur in his search for the Holy Grail.  I got it as a Christmas gift, and it's absolutely perfect!  The thing with this movie, is that it brings all its fans together over a wide age audience.  My uncle is a Monty Python fanatic and it's grown on me even before I knew he was.  The quotes you find yourself saying make it more enjoyable the next time you watch it.  The swallows, the virgins, the wedding, the witch, the 3 headed giant, the knights who say NI!  It's all perfect, it's got this shine to it, that will never disappear.  I've seen this movie so many times and well for me personally; it's never lost its touch.  I've seen the Spamalot play and even bought my own personal pair of coconuts. (*chuckles*)  Anyways, rent this and see for yourself.  You may not get all the jokes at first, or understand it.  As the first time I saw this I was about 8-ish and other then the rabbit scene (which is what I consider to be the best part of the movie) I didn't get it.  But then again, I was eight at the time.  The second Disc with extras is great especially the Lego knights signing Knights of the Round Table.  If you want to see the credits for disc two, highlight the Holy Grail on one of the menus, it's an Easter egg.  Although I haven't watched it with commentary yet, this is one ultimate package for Python fans everywhere....unless perhaps, you are French.