I was really surprised today, I thought it would be harder than it was. I found the running part comfortable and the walking pace has picked up. I followed and completed the C25K through week 1 and had a few niggles with my calf's. I'm doing a lot of stretches for my legs, even on the recovery days. I'm not having breathing problems but I did try and follow Laura's breathing tip and failed, I'll give it another go from the start of the next run and see how it goes then.
Very happy so far.