Your Garmin help, please

^ Bear in mind that the 605 doesn't a barometric altimeter either so the elevation profiles of your ride can sometimes be less accurate than the 705 (if that's important to you).

Cheers, but not really I think - the 305 is the same, and is surprising accurate, once you use elevation correction on upoad to Garmin Training Centre, and possibly otherwise.

What's the leap ahead with the 8 series over the 705?