So, Barry Sears is a smart dude. I've eaten on the zone methodology for about 11 months at a time (I'd say 90% strictly), 2 separate times. I'll say this- it's somewhat tedious constantly weighing/measuring food- although you get really good at eyeing 1 0z of literally everything.I just ordered "Enter the Zone". on the recommendation of someone I respect.
Has anyone read it? If so what is your opinion?
I did it once while I was in the pipeline and one 10 month stretch recovering from my back injury. I had great results both times. Low (8-10% or less) bodyfat pretty much all the time, great workout and ability to recover, basically everything you'll read in the book.
I got away from the zone for a number of different reasons, the most of which is my athletic performance. I just found that on any sort of restrictive diet, there were times I needed to eat a lot more than was prescribed. Even adding extra blocks of fat (I was eating 5 blocks of carb/pro and 7 blocks of fat, 5 times a day min), I just wasnt recovering. I just moved away from it because it didn't work for me in the end.
I'd say try it for 6 months. Get blood work done before, cholesterol, triglycerides, the whole deal. Pay attention to how you feel- sleeping, mid day tiredness, mood, etc. If it works, continue and tweak for your personal needs.