This porn flick about Mozart has quite a few things in its favour.
Firstly, there is the cinematography by Aristide Massaccesi - not spectacular, but pleasantly professional and a little bit more imaginative in terms of lighting and camera angles than the average porn shooter who apparently learned their trade by observing photo copiers.
Secondly, the costumes and sets look fairly authentic. This is in stark contrast to Massaccesi's colleague Nicky Ranieri - when he uses costumes they look like ingredients for a fancy dress party, very cheap and very phony. One of the harpsichords used in this film had visibly a broken string - d'Amato made Jakic (who plays Mozart) use its key continuously so that the viewer wouldn't notice. Nice try, no cigar, but the effort is still appreciated.
Thirdly, the cast is also above average, although they are still found wanting when required to act rather than copulate; still, Valentino (who plays Salieri) shows glimpses of acting skills. What Sean Michaels is doing in here remains a bit of a mystery.
Fourthly, there is a proper story. Similarly to Milos Forman's Amadeus the story revolves around Mozart's rival Salieri, i.e. the way he experiences and interacts with Mozart. The porn gimmick of this film is that Mozart's music arouses women sexually and he makes plenty of use of that. Salieri completely fails on this front, and he knows it: when Salieri eagerly wants to know women more intimately he simply commissions pieces from Mozart.
The biggest weaknesses of the film are the scenes connected to the royal court. Extras were in short supply and thus this royal court is in correspondingly short supply of staff and courtiers. Unsurprisingly, the court's decoration falls short of the regal standards of the period - porn flicks are made on a budget. In case you are wondering why this is a ROYAL court - I am wondering myself, after all Austria was an empire in those days, not a kingdom. Therefore we will never know which queen is so intensely enjoying the company of Mozart and Salieri.