I'm about to use a CDN to host my static landing pages and I think that Rackspace or Amazon S3 + CloudFront seem to be the better choise, but I haven't decided yet.
According to your experiences, which one should be the best? I'm looking for reliability, easy, speed (who has more PoPs?), or if you know a better company?
I see Rackspace has 2 solutions: Cloud Files and Rackspace CDN.
I'm not clear about the difference, I understand both are CDN, but which one would be suitable? I've contacted the Rackspace's live chat but they weren't unable to explain the differences, even I explained them what I'm planning to do.
Please help me clarify this issue so I can take a decision 
I've decided to work with Amazon, but don't hesitate to share your experience 
Im using rackspace cloud files, can't really say anything negative about them. I would say any solid CDN will do the job.
I'm using Rackspace Cloud files and all works good.
I haven't tested Amazon but I'm sure both will do fine.