I went for the wired version. They have a well-regarded wireless unit, but at this point I wanted dependability and simplicity. One of Cateye’s calling cards is that speed is taken off the rear wheel and cadence from the left crank, putting the sensors in one line and avoiding having to wire both wheels, which gives a clean appearance. Installing is straightforward. The manual specifies 3mm (about 1/10 of an inch) distances between the magnets and sensors, but there was no way I could make the gaps that small. The nearest I could get was about 10mm. I routed the wire anyway, configured the head (off the bike) and then mounted it on the handlebar. A few turns of the crank confirmed that the sensors picked up the magnets just fine. For my road riding, I care more about cadence than speed, so I’m happy. Some people have written that the cadence display is small, but I haven’t found that to be an issue. The unit does what it’s supposed to do; it’s one-touch control is a nice feature.