The power snatch is hands down my favorite exercise, but I am not sure if I really get a ton out of training it.
I firmly believe that a big snatch = strong, but I have not seen the kind of 1 to 1 improvement that I get from putting 20 pounds on my front squat, back squat, deadlift, or overhead press. Add in the fact that bumper plates are not available and I really don't do them all that much anymore. For me it is squat, dead, front squat, overhead press, and pull ups/chin ups. If these improve things go "easier" for me.
I will do snatches and cleans with kettlebells, again though more because I like them better than barbell complexes than because I could honestly say they help my ability to "Do the Damn Thang."
I probably just like writing/saying "worked the snatch/worked the power snatch" in my log book.
Has anyone honestly noticed putting say 20 lbs on the snatch helped all that much compared to just a generic "getting stronger"?