When I did my first Goofy in 2013, I followed the Galloway plan - for the most part

- and it worked for me. I was 45 when I started it then.
Keep in mind, the Galloway plan is for purposes of finishing upright, enjoying the experience, and avoiding injury...which fit perfect for my goals. It seems to me the other plans are for people that want to push themselves further and have competitive finish times. I'm curious as to what others might say about that though as that's just my perspective.
Bottom line: Galloway was enough for me.