Uber is much less cost than traditional taxi (could be 3 times higher depending on the driver). Uber drivers are also nicer since they want to earn your good review.
Use the self-service check-in machines, drop your luggage and walk to Pressbyran to have some snacks, SAS flight are not provided with food if you're traveling with SAS Go.
You can sleep on the benches opposite arrivals until about 4am. The café is open 24 hours, has a few power outlets, and friendly staff. The bathrooms are open all night and super clean.
There is no metro or train to the city here. Flygbussarna is the only good way of transport between the city and Landvetter airport. Save money and time by purchasing tickets online.
Very comfortableairport for travelers. Very well organized with nice smiling staff. Free wifi and many places to charge your laptops. Landvetter Airport is sexy!