So I just completed W1R1 and I'm feeling great! I had to take a five minute break, as my chest felt like it was going to explode, felt sick etc, think I left it too close to when I'd eaten. But I did it. I walked the second-to-last run thinking I had loads left and couldn't do it, then I heard 'this is the final run now, give it your all' so I ran the final one. 7 minutes ran out of 35 (including the 5 min break).
Hope everyone starting now has had a positive time of it. I'm kicking myself I only had two runs left when I had to give up and have a break, but I only missed one overall. For an out-of-shape smoker (3-5 a day from 20, I've been vaping for two weeks now) I think I've done okay.