Carb cycling is great, even with my not so perfect efforts I works great. I usually do something like 3 days of less than 75g, then a day of about 100g, then a day of 200g and back to below 75g. Not exactly perfect but maintains the same idea. And it works! Although when I went through my first large weight loss routine I stuck to the 40/40/20 thing religiously. Now that I have settled down to a somewhat consistent weight, playing with my carb intake works well.