I took the MAGLEV train from Longyang station to Shanghai Pudong airport last June, the ride is just a bit shaky than normal Hong Kong electric train due to its high speed. However I overheard a lady from US saying the ride was very smooth, so it actually depends on your previous experience on train ride. And it is very quiet compare with other trains.
I paid 40 yuan for the 30KM ride which took about 8 minutes. There is a digital speed indicator at the top of cabin just below the door.
What actually amazed me was the time taken, 8 minutes to airport is fantastic.
Also, just few feets away next to Longyang MAGLEV station is an under-ground train station which conviniently take you to other parts of the city.
that thing is losing money for now, though in the long run i think it could be quite useful. given Shanghai's booming real estate price, there should be a lot of room for suburban development. so there is a lot of potential market for MAGLEV as a connection betweent he subarban areas and city centre.