Great Detector...but questionable duarability

I purchased my 940 bell about two years ago to replace my cheap ($40 wally world special) cobra. The range is good, I have a 1,200 mile round trip drive to get home and the 940 unit has not let me down yet. I have driven over 17,000 miles with this radar and I have yet to receive a ticket! This radar does have a high volume of false alarms but I don't mind that. My only complaint is that within the first month of buying it I had to take it back to the store and have it replaced (free of charge). Take note that I know how to handle a radar detector and I even take it out of my truck on extremely hot/cold days. There was no good reason for it to die and my truck is only a few years old with no electrical problems. But, this said the new 940 unit is still up and running so maybe it was just an isolated incident.