Paid more than $600 for 2 year of usage, it was great for 1-1/2 year. After I realized the satellite signal was getting weaker, I saw more satellite drops even in the wide open area (rural area), like HWY-5. Now even for more than 10 minutes after power up, no signal at all, I updated the latest firmware, it doesn't get any signal at all. The GPS never been dropped, always put it back in the bag after usage.