And you loose all the convenience of using capsules. They are dirty and difficult to refill, also the quality of the resulting coffee cup is horrible compared to nespresso capsules. A regular italian expresso machine is a better option: awesome quality, you can choose the coffee brand and it is easier to refill than a reusable capsule.
It is not that I think that are hard to refill, it is that I actually tried to refill them. Horrible experience. Also, even using a good coffee brand, the result is not optimal.