So I am new to tandem cycling and fairly new to cycling in general. My 8 yr old and I are planning "big" things with this tandem. We completed the 62 mile route (metric century?? so i was told afterwards) at the Apple Cider Century here in Michigan over the weekend. We are planning to do some self contained rides next summer. I am starting to think i would like a gps with mapping features with me on the bike. Something like the Garmin 705. Is anyone using this or similar products that would like to offer some advice to a rookie...thanks