I did it three years ago. It's a great program. In fact, I would say it contributed to what I now call my running addiction. It's a great way to start slowly (and therefore avoid injury) and build continuously on successes. At the end, I not only finished the race, I won my age group! That was huge for me.
After the C25K try any of the beginner running programs available on Runners World (you pick your deadline 8 weeks, 12, 16, whatever and choose your goal: 10k, half-marathon, triathalon). They're also reasonable and suited to newbies. This next step helped me through the half of the Pittsburgh Marathon last May.
"The grass ain't greener, the wine ain't sweeter, either side of the hill" The Grateful Dead