Okay, I understand about the instant read out situation but I felt like when I was using the VDO w altimeter it was giving repeatable readings so I thought Garmin(for much more money) would do as good.
On the other hand, should the smoothing or whatever impact the HR avg that uploads,do you think?

Does anyone know how to take a route from the Garmin ,upload it to another site like Mapmyride and then use it as a route on the Garmin? If this has been hashed before,could someone point me to the thread. I didn't find it. thanks!