I take about 1 tablespoon a day (1 teaspoon in the morning with the oatmeal, then two more in the evening with a smoothie). I don't usually take it during the day.
I don't take any probiotics.
Forgot to say, yes, I take a full dose of Miralax. Or was taking, before I decided to not take it any more (which was yesterday)... We'll see how it goes.