Maintaining 0 carbs over the long haul is difficult. I would suggest you add some greens (salad with your meat) and modest carbs. 20 - 30g of carbs per day will probably keep you in Ketosis and maintain those benefits, and is much easier on the lifestyle.
Getting leg cramps?
No legs cramps and digestion/ stool has been less but regular. I have yet to experience any negative side affects. I plan to introduce plants and limited carbs once the excess fat around my waist has diminished. I spent or 8 weeks working out and 6 mile eliptical HIIT training and it my waist wouldn't budge even with a diet that consisted of protein, broccoli, cauliflower and greenbeans and onions.
I was using maple syrup instead of plain sugar as a sweetener for tea and coffee at the time which most likely was the problem even though it was limited.