I ran some short (30 sec) hill repeats today. The elevation profile on Garmin Connect looked ... good? I was surprised enough to pull off the peaks and valleys of the altimeter-based elevation to see how consistent they were. My start/stop positions were pretty consistent. Here's what I got... Top of the hill: 641, 640, 640, 640, 639, 641, 640 (all in feet). Bottom: 605, 606, 604, 605, 605, 604, 604. Maybe someone will report a standard deviation or some such and report that this is terrible performance - but I was super impressed. I'm not quiet about the failings of my 920XT (I'm looking at you, barometric altimeter that has failed once (Garmin replaced with a refurb) and failed a 2nd time (restored by some Garmin tech support magic reset)), so I thought that I'd offer a little positive shout out here.