W2R1 on the hottest day so far. It wasn't easy but I did it. My biggest stress was the fact that the app wouldn't work. I got through the the first run and walk and then the voice said "well done, you need to do this again" and closed down. Think it's logged the run but had to use my phone timer instead. A bit annoying really as I find it hard to keep going if I'm checking the time left. But it's done!