The only thing I liked about this was how it didn't run when I would work out or it stayed put. The brush was really nice and i enjoyed it! The thing i didn't like was the way it made my eyelashes feel was really hard and stiff. When I first got it it was to liquidy and took a while for it to dry on my lashes, the more i used it the more it was get a bit dry or easier to work with. It had a bit of a funny smell. Performance Kept my eyelashes looking good for a long time. It did make my eyelashes look longer and nice and spread out. Didn't really clump it did curl my lashes and kept it that way for a while. When I worked out it didn't run and I didn't buy waterproof so I was impressed with how good it stayed. Ease of Application since it was real liquidy it took about 30 seconds to dry and its does matter when I'm in a rush to school or trying to get out of the house and i can't really blink to hard or move my eye a certain way or so anything because it wasn't really dried, so i was afraid that it would get under my eye or above the eye lid.