Paul,
with 42k mikles on my R1100GS, I put in a TT ceramic clutch plate back in August 2003 in Austria...I've just ridden through Africa and am now in South Africa and am delighted with it.
Like Andy says, the take up is a little sharper and it's been smooth and problem free to date. It,s worth mentioning that when i replaced the plate I also replaced the other units that make up the cluth...felt like a new bike.
hope this helps
Simon T