I have developed a slight addiction to OPI since I first encounted them a couple of years ago. It started with just one... it always does... now my collection is out of control. I have to say that I love the collections they bring out and the names of them are cute and funny. The bottles are robust... one has survived a drop with out consequence but I wouldn't want to risk a second fall... just in case. The brushes make the polishes apply smoothly and effortlessly with great spread and less lines.
I find the pigmentation is great (shade depending) and one coat will give an sheer coverage, and two usually enough to give bottle true tone (alpine white and The It shade of yellow may require 3 for instance).
The formulation dries fast and hardens well (although number of coats used will slow the process). Doesn't chip as easily as some other polishes and if maintained well can last up to a week (maintain by adding a fresh clear coat every 2nd day).
I love the range of colours and types of OPI, everything from textures and shimmers to chunky glitters and Matte; there really is such a huge range.
My favourite shades to date are: Alpine Snow Black Onyx Dutch ya just Love OPI and Black Cherry Chutney Oh and the Matte top coat because it literally doubles your nail polish collection.
Least Favourite bottle is "I juggle Men" it really has No staying power and crazed after a day... wrecking the great job I had underneath it. Was highly disappointed with this but is the only one I have ever found that has done it.
They brush on so smooth and dry evenly to a completely flawless finish. Makes even my amateur nail painting skills look good. So easy to use,endless colour selection, and they last so well without chipping. 100% recommend.