I'm inexperienced in this topic so please indulge me if it's obvious. I believe there are a few people here who use dedicated GPS/sat nav devices for navigation. I've only used Waze (on iphone) while driving (a car, I'm still awaiting my ram mount for the bike) and is very useful in navigating the horrendous traffic in the city. I'm wondering what the advantages/benefits are of a dedicated device and if I should get one for the bike. What's the best one (considering price and functionality) for use on a bike? Thanks for sharing.