I have a Garmin 620. I find that if I set it a minute or two before I leave the house it usually picks up the GPS signal.
It did however let me down majorly on Sunday. Ran the Nottingham HM, and was hoping to beat my PB of 1:57 (I'm old and fat), ideally to go below 1:50, which I knew was unlikely. Kept an eye on the time throughout the race, however the Garmin had auto-paused itself for some reason part way through, so my total elation at being told I'd finished in 1:49:45 was destoyed when the official time was clocked at 1:53:44.
It's a great run though, thoroughly recommended.
It did however let me down majorly on Sunday. Ran the Nottingham HM, and was hoping to beat my PB of 1:57 (I'm old and fat), ideally to go below 1:50, which I knew was unlikely. Kept an eye on the time throughout the race, however the Garmin had auto-paused itself for some reason part way through, so my total elation at being told I'd finished in 1:49:45 was destoyed when the official time was clocked at 1:53:44.
It's a great run though, thoroughly recommended.