This review applies only to store owners considering installing the Teemill app on Shopify. I am populating a new store with Teemill products and I find the app itself to be user friendly and very easy to configure. They have good customer support and a good selection of eco-friendly products to offer customers. The quality of the samples I ordered was also very good. I ran into problems when I started to add Teemill clothing apparel to my store. Teemill manufacturing is quite advanced and they have developed a program where the customer can return worn out Teemill clothing at no cost to them and Teemill will either remake it into brand new clothing or they will responsibility recycle it. In addition Teemill will also give the customer a credit towards their next purchase. This is a terrific concept and a big step toward cutting back on the dumping and burning of waste apparel if it catches on with other manufacturers. The issue here is this program was not incorporated into the Shopify app. There isn't any way for a Shopify store to market this program and because the return offer is clearly stated in the care label I felt I would be essentually be handing my customers off to Teemill. Something I can't afford to do. The other problem with the app is that it does not support US clothing sizes only centimeter sizes. I would hope that Teemill will address these app problems in the near future. In all fairness I should also say that you will not have these issues if you create your store on the Teemill platform inst, only on Shopify.