Since it's grapefruit based, you could mix it with 7-up or that grapefruit Shasta soda. I think if you mixed it with grapefruit juice, that would be too much. It is a liqueur, though, intended to be sipped, straight.
Personally, I don't like it. I don't like grapefruit. I have 3/4 of a bottle, here, Kim, do you want it????