Level 1: A slap-stick, physical comedy of surprises, cleaver dialog (including cleaver english subtitles), engaging characters all well presented by the director and actors.
Level 2: Lots of insider jokes, characterizations and situations for those familiar with cultural and political aspects of today's Spain. (As an American, I made good use of watching along with someone who knows a lot about Spain.)
Level 3: A shockingly non-PC movie for the American viewer. The extent of political correctness in the U.S. would make it impossible to make a movie like this in the U.S. and provided this American viewer with a distinct reminder of the enjoyment factor of freedom. Refreshing! Americans should see this film even if they have to use this fast-paced presentation to learn of the seemingly conflicting cultures within Spain at the same time enjoying the rusulting humor.
I rarely laugh out loud watching a film at home. It happened many times with movie. Many times I went back to see the joke again--some were so funny, shocking and refreshing.