What do I usually use?
Urban Decay Waterproof Liquid Eyeliner
Why do I love the Urban Decay Waterproof Liquid Eyeliner?
It has a super thin and tapered brush, so I have control over the thickness of the line and can create a perfect winged line. It also lasts 16+ hours. (I can sleep in it and it'll still be in place when I wake up!)
Why did I decide to try E.L.F. Studio Precision Liquid Eyeliner?
Significant price difference ($3 for E.L.F. versus $19 for Urban Decay)
What did I get from E.L.F. Studio Precision Liquid Eyeliner?
It has a thicker brush that doesn't taper to a point, so I had far less control over the thickness of the line and very little ability to create a pointed wing due to the brush's thickness. It started flaking after about 6-7 hours.
Will I buy it again?
Probably not. Only if I found myself in a situation where I had to.
If I find myself in a situation where I can no longer afford to purchase Urban Decay's eyeliner as frequently as I need to I would buy this again, but would still budget to buy the Urban Decay one. I would use the E.L.F. for over my lash line since I don't mind a thicker line, but would use Urban Decay's to form the wing (and since I'd only be using it for the wing, I'd be using less of it.)
How will I make it useable?
I will probably keep it in my travel makeup bag or in my desk at work for emergency touch ups. (Which pretty much never needs to happen with the Urban Decay liner.)