Note that the site is virtually unaltered from 4 years ago, which means that the flight database is from that period of time (e.g. any routes launched/dropped since then, or OW airlines added/removed), as are the OWE planning rules, the FF redemption tables/rules etc. !
Maybe worth putting up a note about that..
Most routes are still ok so it's still useful for xONE planning.
The QF SC calculator has been well broken since Simpler Fairer but it would be a pia to program the new rules given the number of tables required.