Wow, didn't realize 3 days was the standard. I've been constantly doing 1 week at least. I guess I'm the guinea pig, well I can say it hasn't hurt me at all and seems just as strong. It's strange I haven't noticed any smell, maybe because my fridge almost freezes stuff.
I've been keeping batches of 2-3 different strains and mix it up depending on what I'm feeling like.