So with the constant talk about which GPS unit to purchase I decided to download Garmin topographic maps and Birdseye satellite imagery on to my Rino 650. I had never worried about the gps portion of these radios before. After about 4 hrs of playing with the maps on the computer I had figured out the program and was able to transfer it onto the Rino. I put on the satellite imagery of places near revy and in montana as these are my primary sledding areas. I am very impressed with this program and device. For me the 30 bucks was well worth it for the Birdseye. I find the detail very good and can see areas i had missed exploring. Just thought i would post this for anyone wondering if its worth the 30 bucks.