Prop is a fasting acting ester, it has to be shot at least every other day or every day if you can take it, you should be feeling it immediately. You won't see results in the mirror dramatically when you run it by itself. You should be seeing strength gain to say the least, and you won't retain water on it so if you get any gains you shouldn't lose them when you come off. Hope this helps, im sure i reiterated what a few other people said here already.