Honestly, do you really NEED it? Chances are you already know your cadence and speed. I personally don't really care to know what elevation i am at, or how cold it is. I usually can figure out when to put on the arm warmers by the speed of my teeth chattering together. The one really cool thing about it is the power output. That may be worth the price to you, but not to me. The S720i is a neat package, but i just dont see the need for the majority of users.