I started this program one month ago. I've been taking it slow (knee pain, more recently some issues with an ankle) and have repeated W2 5 times. I'm really pleased to see that while the running is coming along at a much slower pace than I'd like, there are other benefits I'm seeing! I wear a fitbit, and while I know the data isn't precise, it definitely tracks trends and my resting heart rate has gone down by about 10bpm and my "cardio fitness level" has improved from "poor to fair" to "fair to average". It's really nice to see some data that confirms that I'm improving my health, especially in the face of physical and weather challenges! It helps spur me on - to continue the c25k programme and the other activity I've been doing on non-running days.
Definitely won't be getting a run in today... a big dump of snow here!