[…] f real-time pace and/or the correct track. This often manifests as the watch rep […]

Same here, hard to leave Garmin when all my data is there.

I’ve ordered the 920XT, but it’s STILL on back-order, so I’ve been taking my iPhone 5s on my runs to track my workouts. Twice in the last week, my iPhone has apparently become too cold in order to function (upper low-mid 20F temps) and won’t track my entire runs. In both instances, I had the phone in a coat pocket against my stomach.

I’ve had 3 different Garmin models over the years, and have always worn them fully exposed to the elements, and in temperatures as low as -10F. Never had a problem with any of them though.

This may be a different topic altogether – how to track your runs in cold weather? – but it may have some relevance here too.

You probably did run that distance. There was an article (somewhere) that said unless you run the course tight on the line of line of least resistance you will always run more than 26.2: not hitting every corner spot on in London puts on 0.5+ miles, plus you then have the weaving around people…so that was 0.78 extra miles, give or take a bit of inaccuracy.

I have found iSmooth run hits the markers pretty much spot on (or is that the iPhone?!) in most 1/2’s that I do give or take 10 metres. My only half with the 620 (in October) measured 21.26km, It was through open countryside for most of it:
http://connect.garmin.com/modern/activity/605842705

That sounds familiar. I run in Hong Kong: narrow streets and very tall buildings. Still, software updates have helped. However, I also run on a tree covered 4km path, 3 metres or so wide. It is on a very steep hill. So a ‘wobble’ in the read has me running up and down several metres: elevation is meaningless. It will also suddenly shoot off at a weird angle, but that is more to do with the buildings / urban environment I guess. Still, for the price I do think it should ‘correct’ when up loading and that is what annoys me.

It is much better in a low rise / urban environment.

No, I haven’t purchased the FR-620 as Jonathan from Fellrnr.com has provided the unit a detailed review and has documented well its significant problems with accuracy and precision. See his review!

Mark

I was quite excited about the 620 when it came out (except for the colors).

However, after using it for a month I sent it back. The gps was repeatedly way off, and simply unusable for intervals.

Reading more about it, quite a few others have found the same. One of the most systematic reviews I’ve seen of this is at this wiki:

http://fellrnr.com/wiki/GPS_Accuracy

which basically ranks the 620 at the bottom of the barrel.

Hope the 630 does better!

Thanks for the great site – always a good place to learn.

I work in a run specialty store and some people come in with these issues but on rare occurrences. You should return the watch to Garmin, they will swap it. Also keep in mind if you are in heavily wooded areas the satellite reception may get lost and that would occur on any watch, not just the 620. Good luck,

Jason

Thanks RJ!