We took the 1-hour ride, which was more than enough for us. It was a good experience. You don't need to go to the ticket window; just go straight to the line for the boat, and they will already have your name. The boat goes right under the bridge, turns around, and goes to Alcatraz.
Very fun last minute booking. I made this 30 mins before I went!
Very good for the price, friendly & funny staff. I wish I would've had more cash with me to tip them.
The museum was good...its really expensive and could be a little less. Definitely worth seeing at least once. Not something will do often, because of the price.