I use Woolworths site.
I trust the payment link, and the download quality is fine.
I couldnt convince Windows

Media Player to record the downloaded tunes, and tunes elsewhere on my harddrive onto the same CDRW, but hey that not Woolies fault.
The only thing which tripped me up initially during my first download of 4 tracks from Woolies was that theres a screen that says "Preparing your tracks for download, please wait..." and it sits there.... and sits there.... it was only when I clicked on what looked like a logo, in the top right corner of that window, that the tracks started downloading.
Occasionally, there used to be a gap in their list eg: In the top 40, you'd find that there wasnt a download option for say, this weeks number 12, even though the other 39 tracks in the top 40 were all there. I havent noticed that in the last month or so yet, so I guess they got that sorted now.
No problems from Woolies, in technical terms though.
I tend to keep my legal Woolies downloads on a CDRW (or 2) in WAV/audio format until the next NOW album appears.