Yes, I have been taking Vyvanse for almost two months (I am an adult). It is my first stimulant. I find it very helpful. It does not come on with a jolt, it is very gradual after taking it. I don't feel like I am coming on to it or coming off of it. It wears off very gradually. I take 30 mg per day in the morning. I remember the first few days were more intense and I felt more wired and had a bit of trouble sleeping, but these effects went away. It has never made me more emotional. But it does make me feel more up, and it helps me focus and stay on task. It also helps me not fall asleep during the day, which was a big problem for me.

Good luck with your son.