I bought this product to use as a golf course GPS and to replace a Garmin product. This is a really great product but I couldn't read it, especially with polarized sunglasses on. I also found it difficult to interact with onscreen functions due to the size. I ended up with a larger portable SkyCaddie which is a great complement to the GPS I use on the course. Watch and PDA functions are similar if not identical. The question is which size is better.