I didn't see this before...
28 Days is doable.
There is absolutely no Free Will involved.
There is no thought involved.
It is heroic (trust me on this...when people say "What are you doing?" you 'try' explaining it...a look of wonder comes over their face...'wow....')
It is not for pussies. Get your blood tests, pay for the supps, take the pics, post them on the net and get going...
The initial expense and work (filling the baggies with supps, for example)
Your family has to deal with a raving lunatic ("asshole" is the term in my home)