2. From the perspective of cost performance, the cheapest is instant, then freshly ground coffee, and finally capsule coffee. But because of different brands and different quality of raw materials, this is not necessarily the case. Good quality freshly ground coffee will also cost more. Generally, the common cost is similar to that of instant coffee, and the cost performance is the highest.
3, the taste depends on personal preferences, generally instant is mostly three-in-one, with sugar and non-dairy creamer added, the taste will be more acceptable. Freshly ground coffee tastes rich and pure, which is suitable for freshly ground coffee. If capsule coffee is fresh and tastes the same as freshly ground coffee, it needs a special capsule coffee machine to make it.
From the health point of view, first, freshly ground coffee, then capsule coffee, and finally instant coffee.