Reviews for Mary Kay products on ConsumerAffairs, Paula's Choice and SmartSkinCare.com are generally mixed as of 2015. Mary Kay offers a wide variety of different products, therefore it is difficult to gauge the quality of the line as a whole.
Paula's Choice offers customer reviews for a range of Mary Kay products, including makeup, skincare, and accessories such as brushes. Some products, such as the Lash Love Lengthening Mascara, receive a rating of four out of four stars, while others, such as the Clearproof Blemish Control Toner, receive one out of four stars.
Some customer reviews on SmartSkinCare.com state that various Mary Kay products are effective and of good quality. A number of reviews on the same site note that certain products are ineffective or cause adverse reactions.