Stayed for a couple of days in SF and had to snap a pic for the community. Unfortunately, didn't have time to get in one so I can't share about the experience.
Great shot! I live in SF so I've ridden them --- they're fun, but also...they just work. Not as smooth as the new Siemens units that run on the other lines, but they get the job done.
I also really appreciate that they're not a tourist gimmick --- they run a real route, and they take the same payment & cost the same as other Muni bus and rail lines.
There's a railway museum? Cool, I'll be sure to visit it if I ever go back. Though your geoguess is a bit off as the pic was taken near pier 39 and the museum is close to the embarcadero no?