I'm 36yrs old and have combo skin, tried the oils and while they're lovely, they felt a little heavy and sometimes irritated my nose piercing :(
The Charcoal Gel is perfect though, doesn't strip your face, but cleanses off the day and doesn't leave your face feeling tight afterwards.
If you're not sure about the oil vs gel, and you're my age or younger? I'd go with the gel :)
But like all the Happy Products, give em a try for yourself, just on the scents alone you won't be disappointed!