This was an amazing experience to ride up, while in Pittsburgh. FYI f you buy a 1 day Port Authority pass for riding on the trolley (light rail) and buses, you can use that for paying your fare(instead of cash) for riding this incline railroad. Views are amazing, you can see the historic stations on both the lower and upper level, and the upper level station has a lot of nice historical pics along with a nice gift shop.
I'd personally recommend walking 2 blocks north on Grandview Ave once you're at the top, to take in the most clear view of Point State Park. Versus only looking from the observation deck that's next door to where the upper level station is. My original plan would've been to take the Duquesne Incline up the hill to Mount Washington, walk south from here to the Monongahela Incline, then went back down. A lack of time on my recent trip was the only thing preventing me from that, but hopefully next trip I will do that.