I like this Mac liner. It is easy to use and perfect for the cat eye. I only wish that this would last longer. I feel it dries out within a month of use. That still not enough to make me not buy this product. I will continue to use this eyeliner because the price is pretty good.
This eyeliner is great for shaping but not as dark as I would like. MAC's waterproof liquid liner is a much better product if you're looking for a long lasting deep black color. However, its not as easy to create the cat eye line as the Penultimate.