At age 49 and having never interviewed with a significant major or legacy US carrier I spent the money with Career Takeoff. It was money well spent for several reasons, not least of which was that I went into the interview 100% confident that I was as prepared as possible.

They never told me what to say or how to interview but they helped me to be the best version of myself I could be on the day of the interview.

That said, I probably wouldn’t spend the money until I had a scheduled interview.