I still use the occasional tea tree for hair, yes admittedly jumped on that bandwagon on tea tree oil hair benefits. However, I had that bottle from a retailer. From the company I mentioned, I still have the orange and Christmas scent for the house to diffuse, I like the scent. I have used the lavender scent for sleep issues and the supposed stress away oil, those didn't work and don't care too much for the scent. I guess if I had any very negative things to say about essential oils, it's don't pay a ridiculous amount as I did for diffusers and oil club, when you're not going to use them a lot. Do some shopping around, and try just one or two at a time. Or, you'll have about 10 or so oil bottles remaining unused after one use, either the scent was overbearing and nauseating, had an allergic reaction to, or just plain didn't work (all this is me!).
And, there are more essential oil companies promoting pure oils to shop around with, than just the one I listed, and don't have to be a "member" to get a bunch of unused, few try, oils.