I've just completed W6R1. Having run as a youth and experienced the ease and joy of running long distances, I was expecting that I might be feeling some of that by now. Sadly, it's still hard work. I'm managing to stick to the regime and only experience random pains in various joints, muscles and tendons - nothing that persists - so I guess I'm still on the up.
I'm interested in when it gets easy for C25K runners. What is your experience?