So - meanwhile I took a look myself at a local dealer. Unfortunately I am not impressed.
It starts with the color. It is really looking very similar ot the pictures Ricoh presented:
http://www.ricoh.com/r_dc/option/case/
The color is to light and does not fit properly to the GXR - IMHO. I would prefer a dark brown or black. Another issue with the color is, it looks to get dirty very quickly.
The bottom piece of this set is mounted - as usual - to the pod mount. On the right side it fits very well. On the left side it is on a small piece of leather, hold in position by the strap. BTW - a fitting strap is included. So far so good it is not that bad.
BUT with the top cover it starts. First it is made to cover every module, even the A12 50mm. So for anybody decided - as me - owning a real compact camera this case tunes it into opposite.
The top cover is fixed to the bottom part by 4 poppers.1 at the bottom, 2 at the back and 1 one at the left.
And here the technical issues are starting. This type of "Standby-Case" is usually designed to be released and closed quickly. To open 3 poppers first to release the top seems to much to be released really quickly. When you release the top cover then, you realize the case is not really soft. The cover still stays half in front of the lense. I tried to bend it down a bit, but then the last bottom popper release easily and the top cover fall down. So practically it seems the option is only to use the bottom part of the case and keep the top case stored somewhere when you expect to make pictures.
The bottom cover seems to protect the GXR body a bit more than it is originally protected itself. So in general it is looking to be an alternative to the standard kubical cases, but nothing more.
So I am a bit disappointed, as I know it is possible. I own such a type of case for a Contax TVS III and it works very well.