I definitely notice a little bit of a stupor the morning after smoking a lot the night before. I wouldn't say I smoke a lot on a regular basis, but when I do I just find myself a little less intelligent, forgetful, etc., and sometimes it lasts the whole next day. If I just get to a relaxed high and ride it out before I go to bed, I usually don't notice it at all the next day. Maybe it's different for everyone though.