ive always preferred weeding males and females in veg then herm and female in flower, just my preference. I know for tents and small plant count numbers many disagree with that. Feminized can be stable, when done proper with proper genetics and selections, but....and this is a huge but.....90% of the market right now is using cookies gelato and cake none of which are stable. another good indication of the breeder to - just watch how they make drops....15-20 + lines dropping every few months (espcially if its a laundry list all hit by the same pollen donor), those more then likely aren't tested and buying them means you are paying to test for them without knowing it. Knowing your breeder is key, and seeing how they do their process, as everyone has varying levels of standards, quality control, and testing. just my 2 cents