I did try Atkins a long time ago, i thought it would suit me due to the things you can eat, ie butter cream etc but we only lasted just over a week it made us feel very sick and we really couldnt face all the high fat foods for longer than that. Don't get me wrong, my diet before dukan was pretty poor i have/had a massive sweet tooth and no willpower at all which is why we thought it would suit. I wouldnt try it again. Just my opinion though
I did Atkins a few years ago for a long time and lost lots of weight easily and kept it off. But it was super hard when eating out and for me it didn't seem like a "way of life" forever.
After having children, I also felt as though I was setting a bad example sitting at the table with a plate of protein/fat!
Dukan is something I am committed too for the rest of my life, I like the principles and whilst it has rules - they are logical and achievable in every day life.
Good luck in your choice! X