I seem to be in the minority here. I actually enjoyed this film. Or maybe more accurately, I was pleasantly surprised. The reason I stand in the minority camp here clearly seems to be because I have very little knowledge of the genre known as nunsploitation. My lack of experience in this most specific of exploitation genres has perhaps saved me from disappointment. While seasoned fans of this type of flick bemoan the lack of full-on sleaze here, I truthfully never noticed and was instead pleased to see a film with good production values and a surprisingly coherent storyline. The only other title from this sub-genre that I can remember ever seeing was Ken Russell's delirious shock-fest The Devils. Although I haven't seen Russell's excellent film in at least a decade, I certainly remember it well enough. Who, in all honestly, could forget something like that? Now, while The Sinful Nuns of St. Valentine is nowhere near as good, it clearly derived inspiration from Ken's classic, sharing, as it does, the somewhat specific feature of a whole convent of nuns being declared servants of Satan by the religious establishment and then subsequently going temporarily deranged in a sex-crazed fashion.
Set in Spain during the Inquisition, the story is about the trials of a young couple who are in love. The girl's father disapproves of the relationship and sends his daughter to a convent, while denouncing her lover a heretic. After a series of unfortunate events, the Inquisition denounces the whole convent of nuns and seals them inside their monastery alive. This leads the girl's lover on a quest to save her.
The above synopsis is a really abridged account of what happens in this film. Although the story is quite expansive, it is, unusually for Italian cinema, a coherently told affair. Acting is of a good standard too with no one really letting the side down. The cinematography, soundtrack and period detail are all of a very good standard too. So really when you take all of the above into account The Sinful Nuns of St. Valentine is a pretty well put-together affair. I guess it all comes down to expectations; hardened fans (no pun intended) of this sub-genre want more sleaze basically. And although I am certainly not one to argue with that, I enjoyed this as a nicely put together exploitation movie.