I like the Premium Feed as I can easily access the PDFs from there and I don't have to download each file from the web site.
However, I am mostly learning using my iPod which doesn't display PDFs, so I download the iPod Notes files and iPod Sound files from the iLearning center. This becomes a bit tedious after a while, because I have to download two zip files from the web site, drag the sound files to iTunes, connect the iPod, and drag the notes files to the iPod notes folder each time a new episode is published.
Wouldn't it be possible to add the iLearning center files to the Premium feed as well, so they are automatically downloaded and can be added to an iPod more easily?
