It dries my manicures at the speed of light, it gives a finite effect, glossy, almost freezing, it smoothes imperfections related to nail art (unlike coats of paint). Most importantly it does not dry in the bottle after a month, when the bottle is still full 3/4 unlike the others.
On some polish it tends to do is retracted at the cuticle. It does to me for a while, so I assume that there was a real reason (too little polish, for example).