The tower is 632 m high, the tallest in China and the third in the world. The view from the skyscraper is very steep, you can see the WHOLE city. (And this despite the fact that Shanghai is the largest city in China!(: ) And also, I almost forgot, very fast elevators.
Nothing special.
Yes, it's high. Yes, the building itself is high-tech. Yes, there is a good view from above, but with a high probability the smog will not allow you to fully enjoy this view.
In short, a visit here does not justify the loss of time and money for a ticket.
It is worth visiting 1 time, check the box "was" and forget.
You can climb up and see the excellent panorama of Shanghai. I also recommend going up to the TV tower, it has a transparent floor, like in Ostankino, it's cool and scary)