I too did the C25k program twice. Once just to be able to run for 30 minutes, the second time to increase my speed.
I am now able to run a 5k in 27 minutes!

Did an 8k in 46.
I started my running journey back in January, inside on a treadmill. Now that the weather is nice, my running has moved outdoors.
I do at least 4 runs a week, 6 miles each. HIIT one day, hills one day, and a day of complete rest.
My weight loss has slowed, but I think it's because my body likes the weight I am right now. So for me, running hasn't kicked started any great losses, but it has helped me obtain a sleeker look to my legs and backside.
Not to mention how amazing I feel after a long run!