Although there are other tools for netCDF manipulation as well as other ways for INSTAC data downloading (CMEMS motu-client and CMEMS Catalogue), we highly recommend you to start with this in-browser application as first approach in understanding INSTAC FTP structure for file exchange and INSTAC data storage (netCDF files). Additional features such exportation to python scripts for task automatization (i.e crontab) make such notebooks even more attractive.
A subset of examples are listed below, but you may find more at INSTAC github.
25-29 Sep 2017
Copernicus Marine Week
Paz Rotllan (SOCIB)