When she is jungling I take both my buffs, then try to hunt her down at red or double golems. It's risky, but it's almost always a kill if I can get on her. Her stealth mechanic isn't terribly useful in the jungle since she is either at the camp or she isn't. And chances are she hasn't been out of combat long enough for it to reset either.
I'll have to give her a try sometime. She sounds like a lot of fun now, but that she works better with certain teams, and against certain junglers. Like if they had a tank jungler it would be safer to pick her because you know you're probably not going to be counterjungled as hard.