I was inspired by this thread to test Smart Control on my regular short ride today. (About 5.5 miles, several long shallow hills, MUP, higher intensity - for me.) There was a 10+ mph head wind going out. I used the distance option, setting for 5 miles, 150 feet climb, speed 15 mph (my past analog hard ride speed) 10% battery left. I was down to 28% battery when I was getting ready, but by the time I left it had gone down to 26 due to chatting with neighbors with the power on.
It started me off at 35% assist, but as I went up the first hill assist rose to 40% pretty quickly. I had down shifted and was peddling a bit hard. As I went along, peddling hard in progressively higher gears, the assist went up. For t(e last mile and a half or so I was at 100% assist and was going pretty fast. When I got close to home power was down to 12% and assist lowered. When and I still had 12% charge.
Stats for the actual ride were 5.5 miles, 162‘ elevation gain, and an average speed of 14.9 mph. Very close to my estimates when setting up.
I will definitely need to do some more testing on longer, more challenging rides, but it does seem to work. it can definitely help if you forgot to charge and need to tax the capacity to get home. Fun idea.