I have two. I bought both from Authorized dealers, checked and verified with Belscort. One works fine, no problems. The other one seems to work fine too, but I notice when I lockout a false signal, the GPS icon never spins. Don't know if that means anything or not, but just found it strange. It seems to detect real radar threats without any trouble, so I'm stumped as to why. I've locked out many false signals with both and only on the one does the GPS icon not spin. Any thoughts? Also, about three weeks ago, on the same detector, I got a weird alert followed by a "check receiver wiring" message. I went under the dash and re-secured the connection. Since then, I haven't got the "CRW" message again.