How good is the CIX's connect?

I'm debating whether to buy a crossconnect to CIX's 7513 and use it for UUNet traffic. I tried pushing 701 through the shared FDDI and it crawled, but that could have been the FDDI. Does anybody have any good experience with routing through CIX? I noticed one of my transit providers is using it for UUNet. Does anybody know UUNet's connection to the router and how saturated it already is? --matt hempel