Don't forget, the Oregon is pitched as a handheld and as such one of its key features is versatility. I bought mine initially for hiking , I've also used it on the bike and in the car in furrn parts not covered by Europe satnav (Georgia, Jordan, Israel, Australia USA, Morocco, India, China, Russia, Thailand......) as such my expectations and usage are somewhat different and been exceptionally happy with its overall performance.
It isn't an absolute natural for bike use only, I think if I was to be choosing a similar device primarily for bike use, I would tend to the Montana because of the better batter life.