I'm thinking about getting a GPS for the bike. I am wondering how people feel about GPS for navigating on the bike. I've heard some GPS's don't hold up well. I'd hate to spend $600+ on a unit and have it last only a couple of years. I also wonder how many here navigate with just a tank bag/maps versus GPS. Some say you need a Bluetooth headset for the voice commands, but it seems like the screen would be enough to navigate.

Any thoughts appreciated.