Firstly, if you're looking to buy this, here's what you should know: this is a third party reseller, and they're selling a bundled package of two separate tours. This is a good option if you've left it too late to book the Alcatraz tour and it's sold out. There is only one tour company that stops on Alcatraz, and that's the official one out of pier 33. For this, you should never just turn up as it books up weeks in advance. The bundle here includes tickets on that official stopping tour, which covers the boat there and back, an audio tour, and optional ranger tour. The second part is a boat ride with a pre-recorded tour of the bay, the Golden Gate Bridge, and a non-landing loop around Alcatraz, again this is run by another company known as Blue & Gold fleet, who sell tickets from stands along the bay from pier 39. You're buying this bundle at a premium price, but if you've left it too late to buy original tickets then it's a small price to pay for the experiences. I found this buying process easy and well communicated, redemption codes were sent through by email the evening before to be exchanged for tickets at the entry points. As for the tours, the Alcatraz one was amazing and you can find out more on the official website, there's so much to see, a nature element that's educational, and a great gift shop. The bay cruise was taken the following day, it was prompt, the staff courteous, and the audio tour was informative. The views of the bridge can't be beaten, and you get to see the other side of Alcatraz that's closed to the public on foot. All in all, if you're aware that you're paying a bit extra to not miss out, then go for it and book here.