I decided to try out "Smart" Drink Alerts. I used distance based alerts before. So far, I'm getting reminded to drink much more often. I assume this is because it's summer, and warm to hot when I ride.
Since I have poor hearing and the 1030's beep is not very loud, I miss a lot of the reminders. I notice that as I ride, I'm reminded to drink 100ml (about 3.4 ounces) at a time, and the screen shows a total in bottles that I should have consumed.
This seems somewhat useless, since my bottles don't have marks showing the contents remaining, and I use 24 ounce (710ml) bottles on two bikes, and 21 ounce (610ml) bottles on my third bike.
I try to guesstimate how much the Edge thinks I should have consumed, and the average distance I've ridden between drinks. Having a total in milliliters would make it easy to know how many times I should have had a drink - 1000ml would mean I've had ten alerts, for example.
What's your impression of this feature?