You’ll need a roaster. To be honest my Tassimo makes most of my coffee from day to day and I even love the Tim Horton's T-Discs. (This is the part where all the coffee aficionados start dowsing me with holy water and dragging me off to the gibbet) ...but I love roasting and drinking my own high-quality coffee, and for that I have an old iRoast2. I hear these things break down somewhat often, but mine has been chugging away quite patiently now for almost 10 years. I guess it didn’t get the memo.