Looks awesome.. I put a lazer chip in my R1100S and it transformed that bike and I got better mileage too.
I only wish someone here in the US was crafty enough to do this so I could avoid the time and hassle of international shipping.. Anyone?! Oh and I might as well ask here too about the Rexxer tuning unit to see if anyone has any experience? It looks like another fairly slick looking Euro way to retune a 1200 GS.. http://www.rexxer.eu/e_index.cfm
They look to be popular with the Ducati/BMW guys in the old world..