A couple months ago I installed an LC-1 on my '04 R1150RT and finally got some good weather a couple days ago and went for a ride. Most of this info I have posted on the bmwsporttouring sight but for those of you that don't go there I will make a blanket statement: Even if you think your oilhead runs great or good enough install the LC-1 anyway, it's that simple. The difference in lower RPM torque and much smoother running is phenomenal. My '04 has about 42K miles on the odometer and most of those miles were put on ridding in 5th gear. Now, thanks to the LC-1 and all the data posted by Roger, 6th gear is completely usable.
I admit that in the beginning of these LC-1 threads I was a bit skeptical and had thoughts about snake oil bouncing around between my ears but seeing and feeling is believing. That's about the long and short of it.