hammond9705

I've only used mine a couple of times, but noticed 2 things

-if it doesn't locate the Di2 sensor when it first boots up, it won't link the entire ride. The 810 would. The Di2 sensor doesn't wake up until you shift gears which is usually down the road a bit, so it never finds it unless I remember to wake it up before starting the 820. I suspect it might have this problem with other sensors, but they are normally awake for me before the 820 boots

-it doesn't turn itself off. I'm used to saving the ride when I get home and then not turning the unit off(in case I want to check heart rate). The 810 would turn itself off in5-10 mins, the 820 never did

Steve B.

I think DC Rainmaker discovered that you need to make an initial shift before the Di2 WiFi transmitter will send a signal. The Di2 unit doesn't seem to function like other BT or Ant devices, and Shimano's the 800 lbs gorilla that hasn't seen fit to change this.

2TriMaster2

Actually - something I'd like to see is a GPS like the 820 is a feature that could ID bad neighborhoods. I love new routes but when I'm out of town the 'find route' thing is useless. Somebody should come up with a database that considers home prices or town tax revenue to determine if you really want to ride through a place. Wouldn't be politically correct though but would be awesome. I accidentally skirted Camden NJ once and I was lucky to get out of there. Did wonders for my pace though - I gotta say.

SpeshulEd 

It will Auto Sleep, but I can't find anything about auto power off.
Using Auto Sleep

Drew Eckhardt 

Strava's Global Heat Map highlights routes favored by local GPS equipped cyclists, who I assume know enough to avoid sketchy areas.

Drew Eckhardt 

It won't look for a power meter when the bike chosen doesn't have one in its sensor list.

dim

I looked at the 820, but the edge 1000 has a lot more appeal to me especially with the feature where you can ask the unit to plot a route for you which is cycle friendly. It gives you 3 random routes basedon the mileage that you request, showing the elevations etc ... there are more features that the 820 cannot do (as far as I am aware)

I know that there are still some bugs on the 1000, but they will eventually sort them out ... not much price difference between the 2 (if you shop around)

SpeshulEd 

Yes, the Strava heat map is the way to go in finding the best places to ride in a location you're not too familiar with.

This is exactly what I did on Saturday with my 820.
Creating and Riding a Round-Trip Course

Seattle Forrest

Can anybody confirm that the 820 can display your current/instantaneous power and update it every second? The 800 only updates the display every 3 seconds for this, whether you have "power" or "3 second power" selected. Writes a new value to the log every second though.

SpeshulEd 

I don't have a power meter...yet. I'm not sure about this one.

Edit: actually, my trainer transmits a power reading and is ant+, let me see if I can connect the two, I'll try it next time I get on the trainer this week.