They are not a professional product and not the products a professional skin therapist would recommend. Mary Kay and similar MLM skincare companies, Avon and the like, are no better than buying from the supermarket, pure cosmetic.
If you want real change in your skin, seek out a skincare specialist who can prescribe a professional range, ideally cosmecutical range for YOUR skin conditions. This does not have to be expensive.
But when it comes down to it, A skincare routine is better than no skincare routine or one that consists of soap and sorbolene...