Originally Posted by
SeqTarRou
The elevation is actually pretty accurate most of the time. The problems you have are when the weather changes drastically between rides, it takes a while for it to calibrate to the changes but once it does it is pretty accurate.
As others mentioned, I've found the HR accurate and the speed is a delayed reading for the most part. It only uses the speed sensor when it does not have a GPS signal or when you run it with GPS off (like if you're on rollers). I wish it had an option to calculate speed with the speed sensor exclusively, it would make the readout more real time and accurate. Overall, I'm happy with mine, I've had it since January 06 when they first came out and don't ride without it.
+1. I wish the same for the speed sensor, as the instantaneous speed reading is often off. When under heavy tree cover, the speed is usually low, but the average speed seems to be unaffected since it calculates based on time and distance. The elevation is fine, as long as you turn on the unit a few minutes prior to the start of your ride. If you take off just after the satellites sync up, the elevation may not be settled in yet. As long as you have it on a few minutes before the start, the elevation at the start and finish are about the same.
But I couldn't ride long without it. If mine were lost or stolen, I would have another one coming right away.