I haven't had an opportunity to ride with it, so I'm just going to comment on the user interface and physical characteristics.
- The start/stop & lap buttons have been moved to the bottom edge. Not a big fan of that. Depending on how you have the Edge mounted, it could be difficult to get to them.
- USB power plug also moved to the bottom edge. I am a big fan of that. It will be much easier to plug in to an external battery for those REALLY long rides.
- Cover over power plug is hard plastic instead of soft rubber. I kind of wish they had stuck with rubber, as it's less likely to break.
- User interface has been radically redesigned. Can't say if it's good or bad yet, as I have yet to get used to it. It looks like the Edge 820's layout (as you might expect).
- There is a lot of information provided that isn't configurable and useless if you don't have a power meter (which I don't). I would have to preferred to not see that information unless a power meter is configured. Maybe it will be more useful when I start riding my kickr (which does provide power info).
- Pairing sensors is a bit confusing ... as it will pair with both ANT+ and BTLE sensors. It doesn't clearly identify which sensors it finds are ANT+ and which are BTLE (especially when the sensor broadcasts both). I prefer to pair with the ANT+ data, as BTLE can only connect with one receiver at a time. ANT+ can connect with many. I'm somewhat familiar with the lower power RF technology, so I knew that BTLE provides a device name immediately and ANT+ doesn't. So when a sensor showed up as just a number, it was ANT+ and I paired with that one.
More comments as they occur to me.
david