I have had this one forever. It has been a good one. Many geocaches and hunting trips and even used it for my speeodometer on an old honda with a broken speedo cable. I got it out about a month ago for the first time in a while and it wouldn't lock onto sattelites. I googled that problem yesterday and found that if it hasn't been used in a while to turn it on and set it in the open and don't move it for 30 minutes. I did that and it aquired sattelites. I turned it on and off several times and it aquired them quickly like it used to. So I have my hunting gps back and that is what I needed right now anyway. Thanks for the help.