Just started C25K and bizarrely (fat 49 year old with knee pain) I'm loving it and both dreading and looking forward to my runs. Just finished W3R1 and felt OK, ran 5 minutes in place of the last 3. I actually feel better on later parts rather than the first running section of the day.
I've had a look at the future (Weeks 4 and 5) and I'm scared but I look at all the great comments and posts and how good people feel after the dreaded W5R3 20-minuter and I believe them. So, onwards.
First actual running since I was 22! Mid-life crisis I suppose.
To all those starting out - no, a fortnight ago I wouldn't have thought I could do it either but it works.