Originally Posted by Steve B.

I cannot suggest anything or any manufacturer for reliable elevation. You would want a unit that has a barometric sensor as that supplements the GPS elevation, but really I'd say the elevation issues is the most common complaint about all the units and is a problem in general as GPS just cannot accurately measure elevation, its the very nature of how the signals get received from the satellites. Then you deal with how the assorted tracking apps deal with the data sent from the device and what they think they know in their database. And it varies wildly.