Anyone buying a new Tesla can get free supercharging and a $1000 credit towards a new Model S or Model X by using this referral code. Tesla updates the terms of the referral offers quite regularly, but the referral code itself is the same for all changes in the terms. As of this update (April 2018), the first person to use my code gets a $500 credit towards service or accessories, and the first five people get unlimited free supercharging.
And, yes, I think my Model S is terrific!
Chris