I recently purchased one of these GS GPS units from CW. It is the worst purchase I've ever made. Very poorly designed unit. Here's a list of my major issues:
1. Screen is very difficult to see in daylight even with the purchase of an optional sunscreen.
2. Set up instructions are terrible.
3. Routed us on ridiculous routes that were way out of our way.
4. Couldn't even find Petrified Forest even though we were only 20 miles from it.
5. The unit kept trying to route us down tiny dirt roads when there were paved alternatives available.
6. The first unit we received was defective right out of the box. Took it back to our local CW, but since they didn't have any in stock, we had to order another and pay shipping again.
7. Even though you are on a mountain road with tons of curves, it takes the whole screen up for several seconds to warn you of a curve ahead. This is quite annoying.
I tried to take it back to our local CW for a refund, but since I didn't keep the original packaging, they wouldn't take it back. What a horrid purchase.