You get sooo many eyelid tapes for such a low price. One roll has lasted me well over a year with almost daily use. The colour blends well with your skin and it's pretty much unnoticeable if you have fair skin. My natural double eyelids are uneven, so I use this to make my eyes more symmetrical. However, the tapes are not that wide, so I'm not sure if they'll work well with monolids. The glue is sticky enough that it stays on the entire day, but not sticky enough for very humid weather, or if you sweat a lot. Might not appear as seamless if you wear colourful eyeshadows, but if you're into matte, warm, natural tones, these look fine under those shadows. All in all, they're functional, cheap and work as they're supposed to!