I repeated week one, until it was so boring and almost easy.
I think i should have stuck with week 2 longer. I had a lot of scedule disruption for week 2, i ran it 4 times in 2 weeks. I think the extra rest days means I didn't really build up my stamina, I was just so well rested I could just about manage. My many repeats of week one showed improvement each time, week 2 began well, but didn't really feel improved over the course of those 4 runs. I ran some completely, others just barely, but I went ahead with an attitude of 'good enough'. Well, it wasn't. Today my week3 run 1 was frustrating. I could still only just manage 90 seconds, 3 minutes was right out.
I think i will go back to week 2 and repeat until i feel i have completed it, not just done it. It needs to feel easy before i move on. Your mileage may vary.