Even though I did not expect a great film and I found it impossible to relate to a protagonist who is a corrupt politician, the pace changes slowly but steadily as it takes you to a well-achieved climax - the last half hour has to be among the best I've seen lately.
The film portrays the political corruption of Spain in an impeccable and sadly all too truthful way, while at the same time masterfully avoiding ideologies or similarities with concrete people (surely to avoid lawsuits too). It is never specified whether the political party depicted is right or left wing. What is made clear though, is that this applies to any (or most) politicians in power ('power corrupts').
It is groundbreaking for a Spanish film to show how this high-spheres corruption works, as citizens are mocked and abused by politicians. I wish many people will see this film so as to promote greater transparency in Spanish politics.