I get my nail polishes chipped off way to easily. It is a great top coat. It dries quickly and gives nice feel to nails. It somehow saves my nails from breakage after certain length. it is a must have for Mac nail polishes because Mac polishes chip a lot on my nails.
I can almost go a week with this top coat without chipping or loosing luminosity on my nails. For me a week is a long time because my nails usually chip off within 2 days.