The NS Adaptor allows the Nanopresso to use NS CAPSULES* to prepare espresso. The advantage of using capsules is that the coffee is mechanically ground, measured, and tamped with a higher precision than we are capable of doing by hand. There is very little left for error, so your espresso is consistent every single time. Pods are convenient, mess-free, and easier to clean after use.
*NS CAPSULES refers to Nespresso** Original capsules and compatibles. Note that some non Original capsules might not work well with Wacaco machines.