hi ballistic,
yep it is great, i am using it since 5 months and i love it. VErsion 3.5 offers support for cinema 7.303+ via a plugin. and the really cool part is, that you can load animation to cinem ...
http://www.lutzross.de/xfrog/c4dtutorial.htm
i created a little xfrog2cinema tutorial, where i describe the difference between the xfrogplugin for cinema and the export function in xfrog.