I put a set of these extenders on my 1999 FLHTCUI (Ultra Classic) and like the way they give me a little more foot-room, and help keep me from accidentally bumping the shifter with my heel.
Installation gave me a little bit of a challenge, as the bike's oil cooler got in the way when trying to get the front bolts out, but once I went and got a set of ball-end hex wrenches to access those pesky front bolts, the rest of the install was smooth and easy.
I would definately recommend this little modification to anyone who rides a bagger, especially if you wear boots when you ride.
Oh, and did I mention....delivery was super fast!