I can't tell you if The Whole30 is a healthy choice, although the Hartwigs give plenty of reasons why it is. What I can tell you is that I'm glad I did the 30 days and will hopefully eat better having done them. David and I did it together which was definitely helpful, although I let Amber eat pretty much what she wanted.
The Whole30 rules in the most basic form are easy to understand. YES: Eat meat, seafood, eggs, vegetable, fruit and natural fats. DO: Do not consume sugar, alcohol, grains, legumes or dairy. Do not consume baked goods or "treats." Do not weight or measure yourself. I know it seems pretty restrictive, but like they say, "keep in mind that the Whole30 was intended to be a short-term reset and learning experience, not a permanent plan."
I will admit that I "cheated a couple of times" and made a delicious apple breakfast cake that fit the rules. I also weighed myself.