I don't notice it making my lips look any fuller. The scent is very faint... almost unscented. I don't think it feels greasy, maybe more of a waxy consistency. It's fine but nothing special in my opinion. I prefer the Blistex Deep Renewal lip balm personally.
It definitely doesn't do anything to make my lips fuller. The flavor is just a sour wax, like most lip balms, not vanilla. It's not greasy at all! It's a nice consistency although I wouldn't mind if it was a little heavier.