experience with the Georg but it is so beautiful, especially from the back.
I did customize a Friedrich III and IIRC there was a little delay in the delivery time (Indicated=10 months, Actual=13 months).
The overall experience was very positive - from the regular updates, to picking it up in Germany.
A couple of pics of the custom dial, well worth the small premium I feel:


You may find more details here: www.watchprosite.com
Good luck!