I love those brifters (brakes and shifters)! But you have to set up the bike to use them. This is routine for me as I maintain my bike myself. I just beat them and they worked terribly. As well as every brifter. If you can take the time to set up cables, tension, indexing, high and low limits for derailleurs and rear derailleurs, you will get good results. In comparison, the brakes are easier to adjust. Try the youtube video "Park Tools" - great guide and right. Or at the local bike shop.
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