I have been on this diet twice, It sucked and was miserable. At first it's, I can eat all the meat I want!!! Then it's, "I just want a piece of bread". Both times I stopped the diet, I gained what I lost and +10lbs. Plus my sweat felt like grease. I just turned 40 this year and joined a gym, I just started using the myfitnesspal app and it's been pretty useful. My biggest cheat day was 1200 calories over my goal of 2210 calories. I run 3 miles 5 days a week during my lunch break and lift 4 days a week at night. I started this mid January and have lost 8lbs. The weight is coming off a lot slower this way, but I feel like I can maintain this and I feel much stronger. Once I get to 240, I'm going to reduce my running to 1 day a week, but still hit the weights 4 nights a week. I'm currently at 260lbs.

Tried the Atkins about fifteen years ago. Gained everything back. Why? Because it really doesn't work on changing your habits in a sustainable way.
Excercise more, eat less, and healthier.
Had a colleague in Brazil who was into Atkins in a big way. Did it several times, gained the weight back every time, until he developed type 2 diabetes. He's slimmer now, so there is that...
So you're saying the diet game him diabetes? Uh, no.
I am saying the diet did nothing to allow him to maintain a healthy weight.Had the diet been more about changing habits in a sustainable way it may have prevented the diabetes
Try not to jump to conclusions without understanding the argument being made, TIA
I'm not jumping to conclusions, your post seemed to blame the diet for the failure of the individual.
I'm no saint. Right now I'm a tub of goo. But there is no diet known to man that will magically change eating habits "in a sustainable way". Regardless of what the end game is; low carb, low fat, low cal, paleo, vegetarian, vegan, you name it, nothing will change if the individual doesn't change. Some of those may be easier for some people than others. Truth is, they are all difficult (for me at least).
Simply put... your colleague could (would) have just as easily become a diabetic if his failed diet of choice was Weight Watchers.
This is not true unless your definition of "diet" is a temporary period of time where the amount or types of foods you eat is different from the amount or types of food you will eat after that temporary period of time.
The best thing for over weight people to do is to stop eating the amount and/or type of foods they are eating now, and change to an amount and/or type of foods they will eat for the rest of their life. If they did just that one simple thing, their weight would naturally drop on a curve over time leveling out to the weight that matches their caloric intake given their metabolism produced by their age, height, body type, and activity level.
There are a few reasons this is not popular to do:
1) it loses the weight slowly, and Americans are too impatient for those types of results.
2) Most people don't know how their body responds to certain foods. We're not all the same. Some people can eat a big salad and not be hungry for 6 hours, while others would be starving a couple hours later. The one who is starving after two hours could eat a 6 ounce steak with a side of broccoli and not be hungry for 6 hours, while the other would be starting a couple hours later. If you eat the wrong foods, your body will motivate you to eat more. This is a big reason why the low fat craze of the 80's and 90's produced so many fatter people. They were starving their body of good fats, so they hungered more.
3) People don't know how many calories their body needs per day to maintain their ideal weight (and they probably don't know what their ideal weight even is).
If a 6'0" male is 275 lbs today, and knew that at 185 lbs his body would need 2100 calories per day to maintain 185 lbs, and he knew which types of foods his body responds well to, then at 275 lbs he could start eating those foods at a rate of 2100 calories per day, and within two to four years he would weigh really close to 185, and just continue with that diet for the rest of his life to maintain 185 lbs.
But people want results in 2 to 4 months so they willingly try every trick in the book and their weight goes up and down like a yoyo.