any info on greatRakeback, German site, on red star rb?

[RobDoral]

I was wondering if anyone had any experience using greatRakeback (a German site) for rb on Red Star poker (part of cake network)? I don't speak/read/write German so it makes things a little more complex. I was particularly interested if anyone had any personal experiences rather than second or third hand and whether they have some rake tracking page like the large rb sites (and whether signing up with them is easy/not, etc.).

And a related question is of course whether there are alternatives for red star rakeback (I have a deal in place for cake already).

The only other site I've found is Russian and I'm even more clueless when it comes to the Russian language.

Thanks