I have to say this device is an impressive work of engineering, in that, it transforms superheated water at a pressure of 9 bar into a liquid optimally suited for extracting a delicious beverage from mere coffee grounds. Simply coming up with the idea to complete this task as one thing, I am amazed that a team of experts were able to not only manufacture it, but also mass produce it! The quality is impressive--it feels very solid in construction, like it is safe to use for the purpose that it serves. It truly is reflective of its name. There, in short is my critique of it as a work of "art." As an espresso making device, I call it BRILLIANT! Through the simple act of varying the grind size of coffee beans, I can control how good or great the end product will taste. The unit is capable of delivering 40ml of water at 9 bar at 200 deg F consistently, so those are variables I don't have to worry about controlling. Interestingly, an espresso made with 18g of coffee, to me, tastes the same as 20g of coffee, so I go with the smaller dosage simply to save coffee. My only complaint is YIELD. I get only 40ml to enjoy, but this I have to expect, so I find myself frequently making caffe americanos. If a unit were created that enabled me to make 400ml of coffee, like a super advanced jet-engine style moka pot, I would be all over it! For now, I will enjoy my 40ml servings of God in a shot. Thank you for inventing and producing the 9Barista!