Some people at the BitTorrent Entertainment Network didn't do their homework properly it appears. The guys at ArsTechnica have a report about their first look at it and to sum it up, it doesn't sound very convincing.
That you must have Windows Mediaplayer 10 installed is clearly visible from the System Requirements guide. But with WMP 11 it was not possible to play the file (though the guide states 'Windows Media Player 10 or higher'). Before that happened BitTorrent refused to recognize his PC, starting the download from a Mac was not an issue. But you have to know that playing it on the Mac is not supported at the moment.
The good news is that the downloads were quite fast (for example: a 485MB file in around 25 minutes), the audio-visual quality of the movies being good and two of four Torrents worked flawlessly.