I ride an R1200S and use a Roadcrafter 42S one piece (I wear it over a suit when I ride to work) - no problems at al, very comfortable. It may look dorky (my 10 year old says I look like a postman), but hey 10 pockets, good protection, easy to get on and off - what more can you ask for.
btw: I added the option hip and race back protector for added security.
I live in Switzerland and the Roadcraft service from the US is first rate - any problems or issues they sort out staitght away. I have used the Roadcrafter in temperatures down to -5 degrees C and up to 42 degrees C.
Last year I rode Centopassi (
www.centopassi.com) in my one-piece leathers and sweated like a pig ... this year I will definitely wear the Roadcrafter - even though the Italians will refuse to speak with me !