Michael, I do not use it. I believe it must work, I can't see how it could not work technically. It also must be boring.
This is why I don't use it: I learn langauges because I like the process but I'm not sure if I have goals.
As I understand they translate the same phrases to many langauges. Of course they are going to have multiple mistakes:( If there were several similar courses developed by Iranian teachers (or Western Persian scholars) this would make more sense. And I imagine they would cost much less. And I imagine they would never become famous or be discussed by poliglotes or be advertized:( Still they would be just as boring, maybe even more boing.
At the moment, the most famous things are made this way: devise a method, apply it to 100 langauges, sell the result. Perhaps Pimsleur is better, but it costs insane money (never a problem for a Russian - but I think in English speaking you have more respect for copiright). I do not think that you will be using Persian confidently after 60000 repetitions. First I don't see why the effect of 60000 must be so much different;-) Second, Persian is famous for... It appears easier at first but when you move on to literary Persian you find that it is much more complex.