After reading a portion of the cardar1ne Q&A, I don't think I will get it for her. I'm going to take the advice given by you clearly more knowledgable people and probably go the ep1c unleashed route. There are way too many mixed reviews with cardar1ne currently, so I don't feel very comfortable putting her on something that may not do anything good for her and only give her lethargy.
She'll enjoy the increased endurance.
Also if my experience with MK 677 goes well I'll consider that for her in the future!