Thanks Mark. It seems like there is no real consensus about these shifters. We currently have index 7 speed bar end shifters on our Burley Duet. I really hate them, this is mostly because I'm so used to my Brifters and I don't like reaching for the bar ends. This seems like a reasonably priced solution but if it doesn't work then it's not worth the trouble. Have you had a chance to see them in operation?