I train in Karate and incorporate athletic training programmes (e.g. WSSB, designer athletes etc.) with it.
In 2005, I only consume 2 scoops of Surge with 500ml water Post-WO. Recently I start to take 2 scoops with 1 teaspoon of instant coffee pre-WO and 2 scoops Post-WO as well.
1) Has more energy during and after workout.
2) CNS fatigue has largely reduced.
I recommend it both pre-WO and post-WO as long as the money allows and the overal training intensity is high.
Hope it helps,