Decent enough for a model 50 times smaller than ChatGPT. I use orca_mini_3b.

Compile llama.cpp, download a small GGML LLM model and you will have a quite intelligent assiatant running into your phone.

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.

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.

Do not do it. Get a cheap regular expresso instead. Nespresso is like printers, they seem cheap but the Cartridges/capsules are made of unicorn blood. Reusable capsules might be the solution but the quality of the coffee is awful if you use them and you lose the main point of the nespresso: convenience.