Jason is a brand that I wholeheartedly trust. This shampoo is part of why I trust Jason products. The tea tree oil all by itself, makes it a good cleanser, with anti-fungal properties, which also disinfect. I think it's a good shampoo to use if you, or anyone else in your household, has recently gotten over an illness. It just gives you an added step in disinfection. Effectiveness Jason Natural Cosmetics Tea Tree Oil Scalp Normalizing Shampoo Is a very effective cleanser that is also gentle on your hair. It works up a nice, soft, lather. It even works well for people with dandruff. I do recommend using it in conjunction with a good conditioner though, if you have dry hair. Scent The scent is mild, but it smells like tea tree oil, so it all depends on what you think of tea tree oil. It has a gentle, but medicine-like odor, in my opinion. All in all, the smell doesn't stand out too much, though, and it usually won't bother people with odor sensitivities.