Where is the G spot really located? is it differnt for every woman?

I heard roughly the G spot and I was newly wondering if it's a myth or if there's really some truth to this urban legend. Its approaching a Unicorn, you can never really find one :)
Actually it is a spongy like mass in the order of a fingers length or just a bit more, up inside your vagina, on the ceiling wall.
If your S.O. uses their index and middle fingers together, next to their palm up, inserts them into your opening, and touches the ceiling wall, they should surface the spot. Then if they make a motion next to their fingers like the "Come Here" motion, this should sympathetically rub that spot, and hopefully give you pleasure.
Now here is the kicker, some women close to this feeling others dont, your mileage may change.
Good Luck, and Happy Hunting :)
I know where mine is and that's adjectives that matters.