I like the Duo products, but would make a mess applying the adhesives, often squirting too much out or getting them onto the strip hairs. This applicator really saved the day! So easy to use, even if my hands would be a bit shakey. No more excess glue or crooked, weepy lines. The brush deposits the right amount where you want it. Lashes stayed in place all day and didn't lift or spring loose at either end. Thank you!