I purchased #1, 2, and 17. While I've only tried one color so far, I find that it is quite easily buildable to get the desired color. It dries quickly and I find two layers is enough to have a satisfying color, though one layer is also fine if you want a less opaque look. I find that using a top-coat is not necessary because the finish is already very glossy and one of my favorite aspects. As per all nail polishes, I would give it a few hours even after it has dried on the surface and avoid doing anything intense with your hands to avoid getting any indents or scratches onto it while it is still slightly malleable. Overall I'm very pleased with this polish for the price (bought on sale for ~$6 USD each) and quality and would definitely repurchase for other shades.