They have almost a five star rating on walmart.
https://www.amazon.ca/Downy-Unstopab.../dp/B0052456US
Also really high ratings on amazon.
According to the product description
I'm thinking about picking up some tomorrow..Unstopables In-Wash Scent Booster infuses your clothes and fabrics with bespoke freshness befitting a fashionista. Enjoy up to 12 weeks of lasting freshness* by simply shaking Unstopables In-Wash Scent Booster into the washer before your clothes, laundry detergent, and softener. It's the ultra long-lasting luxury of Unstopables. Smell like the lifestyle you deserve.