Good question! I've been reading up on it a little bit, and it seems like it will add some lemon/citrus something to your beer, and it might give the impression of sweetness as well.
I wonder if boiling it might be a bad idea, either due to evaporating the citrusy essences or maybe making it overly bitter. Maybe you want to make a tea of it with hot water and add it to the wort a bit at a time?
(And actually, make a tea of it in the first place, just to sip, and verify you like the flavor/scent?)