After I installed the pro version, I had a critical error on my shop webpage. I e-mailed the developer and got a reaction within 30 minutes with the solution.

Furthermore, the functionalities in the free version are already very powerful. Everything works smoothly and is easy to customize. The pro-version, with the option to adjust product amounts in the side cart is unique and makes it more easy for my customers to add more products to their cart, instead of going to the shopping cart page or adding multiple products.