VO2 max estimation on the 620 is carp, IMO. I had a proper test done just before I got mine, which the 620 started off pretty close to. Then it started climbing, and currently says I have a VO2max of 70 and should be running marathons in 2:23. I don't dare look at what it suggests for 5k. Utter rubbish if you ask me.
Great stuff from Dan & SL.
Not a lot of running from me, but I did do the local relays last night - 69 teams, 4x1.9 miles or thereabouts. A proper quick blast, and we managed second, which was nice.