I'll be a voice of dissent - I didn't like it much. DW had the grey goose lemon and I thought it was a little better. My gran marnier was quite strong, covered up the orange flavor so that it tasted mostly like alcohol and not at all like a creamsicle with a slight kick. Maybe I just got a strong batch. Only slightly better than straight whiskey. Yuck.
That said, I still drank the whole thing, lol.