Won't give u any bad side affects. Try not to take it after 6pm to avoid sleeplessness. Its stimulatory effects will vary according to your sensitivity to caffiene. Honestly at your age u should be focused more on your diet and training. The gains will come. But if you r gonna spend money on something i suggest Shotgun or SuperPump 250.
SuperPump Actually has a legit ingredient profile and specifies the amounts per serving whereas BSN is on trial for wether or not the products contain any creatine at all. Xplode is all hype now. I'm currently using NO Shotgun & loving it.