How to use exceda (Akamai)

I have signed up for exceda account which uses Akamai's network but I am kind of lost in their settings page. These are the options in there :

Origin Host
Origin Forward Path (optional)
Modify HTTP 'Host' Header Value to use origin : Yes/No
Published Host(s)
Edge Hostname

Above are the settings in there and I know what to do with edge host name but rest of them I have no clue what so ever. I have successfully set up Cdnify and Cloudfront but this one is confusing. The problem is that it wont let me use the edge host name to serve my site's content.

Any idea what I need to do about this? Or the best thing would be if some one can please convince me why I shouldn't be using Exceda.