@arjanvanb The quantity of data you can take from it its entirely up to you. It outputs the pseudo-data from satellites if "views" and not the NMEA coordenates. Its a diferent concept.
Developers are used to traditional LAT/LON coordinates in NMEA packets at 1sec intervals while the GPS engine wastes away precious juice by being continuously operating. Even putting the GPS to sleep and wasting ~10uA is too much.
Fastloc concept is to get a map of the sky. And that map says how many sats there are and their RSSI values. All this done in mili-seconds. These pseudo/raw values are then sent downstream and calculated to get precise LAT/LON in the server that has immense computing power to use. While freeing the remote nodes to conserve power instead.
This concept originated in the animal tracking community a while ago with the intent of extending trackers life time.