I've never taken it PWO.
If taken 30 minutes prior to training it will peak during your workout and have strong action for the first two hours. Then it will decrease and be completely out in 4 hours. This works well with a pre, during and post workout shake. That way you not only get the benefit of high insulin with your PWO shake, but you also cram aminos and glucose into the muscles before and during the workout.
I'll put it this way, I had to lower my AAS dose because I did not want to grow as much as I was.
I will warn you though, you are much more likely to go hypo during your workout since you are using glycogen during workout.