The multiple CDN delivery is pretty amazing. The service is pretty stable too. Not much as such, but I would suggest you try it at the demo stage and if you are not satisfied with the UI then do not purchase. They are a good service but the UI could be better. We were using CDN with them and their service was excellent. We had an issue and their support team worked at fixing it. They also offered multiple CDN option which we had been using. I like that it is easy to set up new sites for different countries or regions. It's also very easy to use in combination with my own web servers. The interface could be more intuitive, but this can probably only be improved by using an admin panel instead of just having access through FTP files. We are solving problems related to traffic distribution between our main site (in Germany) and several others located outside Europe (for example in Africa).