Travel from the airport to Shanghai CBD is quick, much cheaper than a taxi and hasslefree. The Maglev is well run and offers a professional transport service.
Shanghai Metro is a very cheap and convenient way to travel around Shanghai, especially during rush hour. You can easily stuck on the road for 2 to 4 hours but the metro will get you there in minutes.
Travelled a lot on the metro and the light rail in Shanghai, found it easy to buy tickets and it's convenient travel at a very reasonable price. The light rail you get to see a little more of the sights of the city. I would recommend it as a travel mode.