Bunch of factors. The size of the micronized silver particles... did you know silver nitrate solution works as well as STS. Works better then CS.
Femme is all good for beginners. Also if you have a m2 grow space. The thing is minus the male potency suffers. Smoke regular bud you've grown, then smoke a femme of the same strain.
You see femme can only be the parent/s used. No chance for outliers. No chance to evolve flavor or potency etc. Speaking from a breeding stand point, it's lame.
Speaking from a money in my pocket from NOOBs stand point, full fuck yeah femme. Also preserving strain genetics that are clone only lameness or already femmed genetics.
Reversing using Silver nitrate and STS prefered to GA3, CS and hermi town self rhodilization.
My opinions formed over the years. Take it for what it's worth.