I only rate this oil 5 starts because there is not an option for more stars! SERIOUSLY. I have been practicing aromatherapy and massage therapy and running a successful day spa for almost a decade. I have never ever ever found an oil that i am in love with more than the Head Soothing, I use it for way more than headaches / migraine relief. I constantly diffuse this oil through my spa everyday. I CANNOT get enough if it. Usually I am not a huge fan of lavender, but in this blend it is phenomenal (I have not tried the Simply Earth single lavender oil yet) and the frankincense is just the right amount of earthiness, with the subtle floral notes of the rosewood which can usually be overpowering from other brands. If I could get married to an essential oil, it would be this one (lol!) All hail the Head Soothing synergy oil... best blend ever.