The mag lev is fun, but the "city" terminal is quite a cab ride from the city.
Also, keep in mind that one of the trains had a fire this Summer and, as there are apparently only two trains, they had to cut the schedule in half, from every 15 minutes to every 30. With increased passenger load due to running a half schedule.
If this has been fixed, I would go for it as a one time experience. It really is interesting.