No picture on the site yet but I'm sure it's likely larger than the OEM rack. Also rather pricey at more than $100 over what I can get the OEM rack for. My dealer has been selling accessories to many here at 22% off MSRP far as I know... with free shipping.
Still I am considering making my own. Made one for my ST. Shouldn't be too difficult. Just some strong struts to the back and a strong plate over those with spacers to mount it.
We should be seeing much more of things like this now that the CTX has been out a few months.