Like any major fast launched diet it came under the microscope and was looked at by many health organizatons and individuals.
There are many articals available. Try googling Atkins dangers.
I don't know how valid these critizms and flaws in the diet are. I have never done Atkins just because I don't like meats and there is no way I could be happy eating that stuff :)
I say if it works for you than go to town with it. :)
Good luck