The owner of SimpleCDN struck me as a bit flaky and rude. When I searched then for reviews of SimpleCDN you'll see some red flags in the way he responds to other people.<p>I asked something about this myself a long while back:
<a href="http://news.ycombinator.com/item?id=181010" rel="nofollow">http://news.ycombinator.com/item?id=181010</a><p>If you have your "showdead" flag on settings, you'll see some comments there that are kind of anti-SimpleCDN from people who had commented on nothing else before and/or just signed-up that day to comment. I'm not sure whether that's someone trying to discredit them or just a coincidence.<p>We considered using them (and played with their service a tad), but Cloudfront has been working well enough for our needs (since we also use S3 a lot).