Don't know about the abdominal pain, would like to hear some of the more experienced users take on this. But Carb Nite is safe for long term use and not only power dieting. Kiefer only called it power dieting when he didn't knew the long term effects. He changed that to, you can use it for ever if you want to.

Not according to Kiefer. 

Also if there is new science where you can use carb night long term for the rest of my life, I would love to and I feel the best when I am eating like that so if that is a possibility please share.

Highly recommend Jimmy Moore's new book, Keto Clarity.  I am not finished reading it yet, only about 1/3 of the way in... but if you think about it... man, it just makes sense.  Really think back to our ancestors... who survived on meat+fat.  Not just survived -- but were not obese, and were not sick, sick, sick like so many are today.That is a book about remaining ketogenic, not about having carb nite once per week.  But my point is, there are lots of folks out there who consume very little to no carbs long-term, and they are thriving.As for your abdominal pain... have you tried digestive enzymes?  I have a good friend who is trying CN and she was really surpised by her stomach upset caused by carb nite also.  I gave her some of my Absorb Aid to try, and she said it really helped.

Re: the abdominal pain with carbohydrate consumption.. You could try doing some prebiotic type therapy, could be some sort of dysbiosis. Something like the product Prescript-Assist may help out your situation. Pricey, but you'll know after one bottle if it's helping or not.

Carb Nite is a diet you certainly use long term, however, I think once you achieve a good body composition, you should incorporate some carbohydrates in your diet daily or a few times a week.  Not much, but a 100 g every day would be a good idea.  This will greatly expand your food choices and variety of food is important for optimal health.  ULC really limits your food choices and I believe it can lead to nutrient deficiencies.  While paleolithic man consumed mostly animal foods, they had much more variety in their diet and they consumed damn near the entire animal.  Not to mention their foods were nutritionally superior. 

Carb Nite is a diet you certainly use long term, however, I think once you achieve a good body composition, you should incorporate some carbohydrates in your diet daily or a few times a week.  Not much, but a 100 g every day would be a good idea.  This will greatly expand your food choices and variety of food is important for optimal health.  ULC really limits your food choices and I believe it can lead to nutrient deficiencies.  While paleolithic man consumed mostly animal foods, they had much more variety in their diet and they consumed damn near the entire animal.  Not to mention their foods were nutritionally superior.

Agreed...nutritionally, our food does not stack up to what our ancestors had exposure to. ibob, would you suggest after incorporating carbs back into your diet (say 100 g/per day), would you do so in a cyclic manner with CNS? Meaning, go CNS for a period of time, go with carbs for a few months or so, and continually alternate? Have you seen results with this approach, or simply just maintain carb amounts around 100 g unless a lot of weight/fat is being gained?

Health and fat loss are two different things.  For health, I don't really think it matters if you have carbs every couples days or daily.  Just as long as the average amount per day is appropriate.For fat loss, performance, and staying super lean, I think that is where the timing matters.