Quality shoe tree when compared to pricier versions from shoe stores in the mall. Sizing is just right as detailed on the site. Medium is perfect for my husband's size 9 shoes. Spring action is smooth and not so stiff that it stretches the shoe. A nice feature is the notch on the heel section of the tree that allows you to easily remove it by simply hooking your finger around it. Without it (as with other trees), you have to grab the tree around both sides and over time this can stretch the width of the heel portion of your shoes.