It smells very strongly, like medicine. But it works so well on cuts and things. I sliced the tip of my finger when I worked in a deli and it completely healed in 3 days. It does sting a bit, so I don't use it much on the kids.
It's also an ingredient in my shampoo and I think it does a very good job clarifying my hair, naturally.
Please be very careful with Tea tree oil, it can be poison! It is suppossed to be mixed with something else before use, for cuts take 2 Tablespoons ointment or vasalene and add 2 drops of tea tree oil, stir then use.