1st bag got contaminated and never really took off growing, they were kind enough to give me a discount on a replacement. Replacement was going well but I was a bit unclear on what "fully colonized" looked like and accidentally killed my 2nd bag by breaking and shaking when it was actually ready to fruit (I learned this on the 3rd bag) 3rd and 4th bags have been pretty awesome. 3rd bag I flushed 3 times so far for a total of 51.1g dry, and 4th is steady rolling along colonizing. Hoping to get a bit more from the 3rd bag soon. Overall the experience has been rewarding and very simple.