This is a must-see while in St Louis. Buy tickets for early in the day to avoid crowds and long lines, and allow plenty of time to find your way in and get through security. I highly recommend watching the 30 minute movie on how the arch was built, just incredible and really makes you appreciate the ride to the top even more.
There is a full museum inside so you can wander around until time for your ride to the top. Also a small snack bar, which is convenient since there are no restaurants right next door.
The cable car ride takes 4 minutes to the top. They are small cars that cram five adults into a space for two lol. I would not recommend this if you are claustrophobic. There is a sample car in the museum that you can check out first if you want.
The view from the top was great! You can stay up there as long as you want and then catch any cable car going back down.
The cable cars are not for anyone with physical disabilities. There are lots of stairs in and out, and we had to stand for 20 minutes or so waiting our turns.
Enjoy!