I'm curious what makes it great for the weekend for you. Not being able to remember what your goals for the day are or remember what you did the day before doesn't sound great, even if it is the weekend.
That being said, I may have exaggerated the memory issues. It isn't like full blown amnesia. More so it just takes longer than usual to remember things. I'd compare it to a cache miss. Smoking clears my brain's cache the next day and I end up feeling like I am pulling short-term thoughts and memories from colder storage.