i'm using my AromaBulb with grapefruit in it as i write this. :)
Pros: i love grapefruit. this stuff is awesome. i've already ordered more so that i don't run out. GREAT scent.
Cons: haven't found a con yet. oh! push down and turn like a medicine bottle. i sat there for a while like a moron trying to figure out how to open the thing. haha.