I'm on them right now. A year ago my doctor started me off, trying different ones trying to find the right one. The first one I tried made me sleep like 24/7. I just couldn't stay awake. I even fell asleep just waiting in the waiting room. It's like I couldn't go ten minutes without a nap. Then I was on one that made me restless. I couldn't relax, I had to constantly be moving, and I'd go crazy if I couldn't (car rides). Then the next just didn't do shit all. I was still unstable, having crying fits and cutting daily, overdosing on meds, and getting upset at everything.
Now I'm on venlafaxine and it's been great. Stable mood, no crying, no cutting, and no shitty side effects.