Thanks! I like the planet X calipers, but I have a hell of a time keeping them centered! I'm friends with one of the designers so I should just take my bike in and talk to her and have her look at them. Stopping power, they are good. I would say just as strong as my ultegra 6700's I had on there prior. Took a little bit getting used to with them not having a quick release, but with the enve's I dont even need to have one since I just loosen the QR and the wheel falls out. Great option for an inexpensive, light and good stopping power.