I have Core for 2 years and I use it as everyday watch and on my mountain bike rides.
On my bike rides I usually create a new altitude log, so I could see my total ascent/descent and the altitude graph.
But in the end the graph seems to be correct but the total ascent/descent as much more gain then I expected.
When I reach some points, where I now the altitude, it is correct. So, maybe when the bike is in move there are many barometric changes.
What do you think about that?
I´m very happy with my Core, but when I was to buy it what I really want was something like Ambit. Maybe I'll get one of those.