Jose Maria,Ponce is a spanish well known director in his country, because he made films like Gothix (which later inspired this film), Four Sex Rooms (a parody of Four Rooms, with four porn directors) and mainly because he was the first serious porn films' director in Spain (nothing really explicit was filmed in Spain until his coming, in 1993).
So Private expect more of him. In fact, he later directed another film for the Fetish Machine label.
This is an explanation for those who don't know the full story.
The film is good, but maybe most people were disappointed for everything. Ponce tried to make a mix between gonzo and feature film, but it tends to the first side, though the sex could be much stronger. And that's the main problem: if you make a mixture and you give more importance to one side, but at the same time you try not to make it as strong as it should (because there's a producer who says that you should make a feature, not a gonzo), then the results are bad. It gives you the feeling of being nothing, trying to be everything. That's the problem: the film is pretentious so it doesn't really work.
The cast is great, the technical purpose is even better, but the hipocresy of the film it's a mistake. The main problem in Spanish recent porn films is the pretentioness: everybody has an artist, porn directors are suppose to be artists when they really aren't, because they don't know how to direct well. There are two or three exceptions (like Narcis Bosch or Max Cortes) but in general lines that's it.
Anyway, if you like Belladona in a softer way, or if you want to see one of the hottest scenes of Sophie Evans (at least I think so), or if you even want to enjoy Nacho Vidal or another Spanish boys and a Spanish starlette called Bibian Norai, buy it. You can see what's worth on the up corner of the review.