sounds too scary - after years of trying to lose weight and finally finding something that works I am not sure I want to risk changing back to eating carbs in any quantity - ~I might become hooked again.

Be interested to see if anyone else has tried though

I think it would highly depend on the person's metabolism, their activity level, what they ate, etc.

Personally if I had a totally free day to eat whatever I wanted in whatever quantities, not only would I have a belly ache, I'd have a carb hangover the next day and be riding the insulin train again, like sue said. I can still eat ice cream occasionally in a small amount (though I did find a way to make my own low-carb version). I avoid gluten, so I wouldn't eat a cheeseburger on a bun or pizza with the crust, I find my own ways of making that stuff at home, healthier. It's a more sustainable way of eating for me, to maintain once I get to my goal.