We like, and recommend, the Crankbrothers Speedier Lever. If you have to pick only one, go with the Pedro’s, but if you want a backup or have some hard tires to unseat, Crankbrothers is a great choice. It’s only one lever (as opposed to a set of two, like the Pedro’s) and it’s longer, so we didn’t pick it over the Pedro’s for portability reasons. But it’s an excellent tool. It has a wide handle you can grip with your whole hand. Like the Pedro’s, the tip is the right size and shape to prevent slipping and stay in place, and the shape of the handle happens to protect your knuckles if you do slip. Even in situations where I didn’t need it, I liked having it because it made me feel like a pro.
Friction gear systems are a lot simpler to adjust, because the movement of the derailer cable can be modulated as you ride, every time you change the gear- they require less cycle maintenance. Modern index shifting systems are a little more complicated because each ‘click’ must release the exact right amount of cable to allow the derailer to move the correct distance to move the chain from one gear to another. Setting up and adjusting a derailer is not difficult and requires only basic tools, but there is a methodical procedure to follow.