I started October 2007 using the updated Atkins you see on the Atkins website (really could just as well say the Zone diet, because when I exercise a decent amount I follow the Zone guidelines for increasing carbs - all of the younger guys I work with who train for bike races/marathons use the Zone guidelines). I do not weigh because I am somewhat OCD, and I don't need to fixate on daily differences, but so far I have dropped 7 inches off my gut, gone from a 41 inch waist to a 37 inch waist, gone from a 17 inch neck to 16 inch neck, and dropped from a standard "XL" shirt size to a "L" in most brands.
My goal is to lose 4 more inches off my waist to a get to a 33 inch waist - to be where I was 30 years ago in high school - by the end of this summer. My other goal is to now work back up to being able to run 3-4 miles a day (something that is nearly impossible when you are 60 pounds overweight and pushing 50 years old).
My wife, who weighed 137 last fall, has lost 10 pounds just because what I eat, very limited carbs, has changed what she eats, and she's thrilled to wear the clothes she wore 7-8 years ago.
Planters Roasted peanuts are my standard snack, and I have a very large serving of bacon every Sunday morning, so I am on the modified Bronco Billy plan. LDL cholesterol -- despite eating much more fat and many fewer "healthy whole grain carbs" -- is much lower, and resting pulse is much lower.
I feel tremendously better than I did six months ago.
I have basically limited myself to 20-30 grams of carb a day, most of which come at dinner (I have under 10 carb grams during the day), and I have one meal a week when we go out on Friday or Saturday night where I do not count carbs and allow myself a treat of sorts.