I've just started using Hadd's method for my training.
This is it here: Link to www.counterpartcoaching.com
I have been doing it for 2 weeks now. I am trying to increase my mileage from about 40/50 miles per week to 50/60 miles per week. Then hopefully 60 to 70 miles depending on my training time and how much faster I get. I am doing 2 sub lactate runs per week (155-160bpm) and the rest of my running is below 145bpm. I have been going quite a bit slower but feel much better and my legs feel much fresher than what they had been.
I was wondering if anyone else is using his method or has tried it in the past and the results you have got with it.