I've just completed W7R3 after giving up halfway through on Monday! Yay!
I chose a different route, partly on country tracks - I'd always avoided slopes and rocky surfaces because of my painful knees but it was a joy! No, really! I even exceeded the 25 minutes because I accidentally paused Michael at the halfway point when I checked my progress, and I think I ran about 3.8km. So if you're feeling discouraged (as I was yesterday) don't give up.
I'm starting 2018 today! 👍