When I first started using computers, I insisted on having cadence, but over time, didn't find it something that I cared much about and just generally ignored it. And the wiring to a cadence sensor is generally more obtrusive and difficult to route. But if you're into serious training or racing, it is almost a must have, although in this case, you probably want to go the whole nine yards with a power meter, HRM, etc.

- Mark