These electronic levers provide one of the smoothest and simplest shifting experiences that cycling has to offer. Using a new digital system, you can shift gears with a tap no heavier than what you would use to click the mouse button on your computer. The ergonomic design fits your hands comfortably, and helps make for a pleasant and comfortable riding and shifting experience. These levers are capable of use on all terrain and in all weather, and are built to withstand the elements.
One thing to note when purchasing these levers is that they only come with a connector to integrate the levers into the Ultegra wiring, derailleur, and battery kit, all of which must be purchased separately.
Customer reviews of these levers are overwhelmingly positive, with the few negative comments being mainly related to the lack of knowledge that the rest of the Ultegra kit was required for use, and that these levers may be suited for those with a bit smaller hands. As bikeradar.com puts it in their review of the complete Ultegra kit, "In all fairness, it's not difficult to crane your index finger upward a bit-- and you can use your first knuckle for rear upshifts-- but all the same, we'd prefer not to." It seems that it's not a deal breaker if your hands are a bit big for the levers, but it may be a nuisance all the same.
Overall, these levers are praised as comfortable and very easy to use, and are well suited for all levels of cyclists.