I have been using MaryKay products for over 5 years now and love, love. love the product!  My favorite is the Timewise Age Fighting Moisturizer.  I use it faithfully every day and every night among many other awesome products.  But if I could only have one, it would be this one!  The formula is so smoothing on my face, neck and chest.  The bottle design is simple yet elegant.  The way that my face feels after I put it on makes me very excited to apply other products and apply my makeup knowing that I will have flawless foundation, soft supple skin, and less wrinkles in 20 years than my other...