I use this on my bike. For the same reason I have gauges on my car. For no other reason then to have the information. Information is good, Its what we do with it that counts. It has a Clock, Trip length in km & time, Shows average and actual speed, And odometer. Everything I want for $45 CDN. I wouldn't go without it.
https://www.trekbikes.com/ca/en_CA/e...olorCode=black
It's got nothing to do with being obsessed with performance or numbers. If it was I wouldn't be riding one of Giants most upright bikes, The Sedona. As a recreational rider, It's mostly about comfort, pleasure and adventure. Whether I ride 15 or 50 km makes no difference. Whether I'm cruising at 20 kph or if I'm feeling athletic, I'll do some sprinting or riding up a challenging hill, It has to fun, Otherwise what's the point.
If I was a commuter, I would always leave some extra time so I don't have to rush. Here the information from a computer will be handy. And I would be riding a more aggressive bike with less wind and rolling resistance like the Giant Escape.