I got one mixed pack, germed them in peat pellets and all popped. Can't say I saw any real benefit from the coating. The color washes off if you put them in water, so make sure to mark them before.
Because of a root slime issue, I lost all but cheese and trainwreck. I only have B's farm nightshade to compare to, and cheese so far blows it away in terms of crystal production and buzz strength. I tend to like the nightshade taste better.
All GHS plants cloned easily, grew vigorously, did not hermie, and produced a killer yield. (DWC, 600wt, DM nute line) The trainwreck is more sensitive than most plants I've grown. It doesn't like the PH to fluctuate much at all.