I've read that some successfully use their iphone as their GPS. I like using it in the car with MotionX GPS(Iphone 4s). I use it in a Bike Logic case to track my route and mileage on the mountain bike. But that is only after the ride is over when I can find some shade to view it. How are people using it in the sun on the motorcycle? I thought that maybe mounting it upright behind the windshield instead of laying on my hadlebar might improve viewing. Any insight or suggestions? Thanks.