Checkout Steps Sidebar

I tried to look for new ways to display the steps a user has to complete during the checkout of an e-commerce experience. One solution was to create a sidebar and to show them there.

The user should be able to see the completed step(s), the current step and the ones to come at any time during the checkout process. It's also important to show the total quantity of steps in order to tell the user how much effort is still needed to place the order.