I disagree with the mockers. The movie works.
Call me stupid or whatever, maybe I enjoyed my film class at UCLA and paid too much attention. Both Johnathon Schaech and Lori Heuring do a very good job of "selling" their characters. Maybe those people who say it is too slow have Attention Deficit Disorder or they were agitated by the nudity and missed the movie. The nudity and sex is explicit but not sordid or trashy like a 45 minute porno full of "outtakes".
The screenplay provides motive. The blackmail can't be disclosed because of the social and political fall out it would cause. The photography, lighting, editing and "momentum" of the film are in sync. The production values are excellent set against the natural beauty of Budapest.
Lori Heuring's acting in the last scene sells the gag. You can see the shock on her face and her illusion crumble by her expression. If you disagree, go look again.
What is everyone complaining about? Do you prefer "Knocked Up" or a National Lampoon movie instead? This is "old school" film-making. We were pleasantly surprised and would recommend it to anyone who wants to see a story unfold.