Hi Peter, I have bought and used the GNS2000, Garmin GLO and the SkyPro160. The GNS2000 I gave to a friend and with which he has never had, as I never had, any issues, it does also have a very definite on/off switch, the bane of the lives of those who have a Garmin GLO. When Apple, on two occasions recently, cocked-up their iOS upgrade, the only GPS to work was the Garmin GLO, the SkyPro just...