I would _die_ without my cyclocomputer. I _have to_ know my mileage and how fast I am going. It ruins the ride for me if the computer is not working. I don't have cadence- IMO just one more thing to not work right/break. Not saying knowing your cadence isn't useful, though.

It's so cool to look at the cumulative mileage, too, for the bike's lifetime, for the year, etc.

Plus, once you get into randonneuring, :-) you will need an odometer to follow the cue sheet.

Plus you don't have to remember your watch.

Nanci