There are some pretty diverse ideas on this forum. Here's my opinion.

If you're going to ride country roads, you'll find yourself getting lost easily. This is why I spend alot of money on my GPS because my routes can now be customized to ride through subdivisons and country roads involving lots of turns. I can have upto 65 turns when traveling over 70 miles but it's worth it. It takes time creating a complex route avoiding major interstates but isn't that what Adventure in Cycling does?

Someone mentioned blind turns going uphill being a problem. I agree. If this happens, I'll get off the bike and walk the sidwalk uphill until I'm past the hill. I think it's so important to get a rear view mirror like the Take A Look because it take alot of the fear of traffic coming from behind.

Someone also mentioned riding on sidewalk and yeah, I do it too. However, the Take A Look mirror really helps when riding in a major city.