I am a Couch to 5K survivor!
I literally got up off the couch and started running. I had done no exercise in years and had never run before in my life.
My first day, just doing the 5 minute warm-up walk made me huff & puff and my legs were cramping. I barely managed to "run" 45 seconds of the 60 second run intervals. I only completed 15 minutes because I was afraid I wasn't going to be able to get home.
Six weeks later (and only on W4 of C25K) I did my first 5K. I managed to run 1 mile, walk 1 mile, and run the final mile. I finished with a time of 46:31.
Six weeks after that, my C25K graduation run was another 5K. One with lots and lots of enormous scary hills. I was able to run all of it except the hills and finished with a time of 43:36.
I totally believe in and endorse the C25K program. It changed my life and made me fall in love with running.
I run 3 times a week and can run as much as 4 miles. I've improved my 5K time by 8 minutes in just 3 months. My best time for a 5K distance is now 38:32.
Good luck! C25K is awesome!