I have no tolderance. I've smoked every day for the last 4 years, and by every day, at least 7 grams a day. I've never had to take a break, and 1 joint still gets me fucked. I dont think it lasts quite as long as it used to, but it doesnt bother me. Maybe in the next year/2 years i might try and take a break for a week or two, but then again, without weed my back pain/headaches/knee problem become unbearable.