I don't have much to say positive about the ferry, other than...it works? The vessels must be at least 50 years old and they only have one accessible entrance about 10' wide, so it takes almost 10 minutes to unload and another 10 to load (when busy). The windows are small and cheap fibreglass which you can barely see through.
You feel as though you're being herded like cattle at the gate area, and the lines are disorganized which allows some idiots to sneak ahead. Too little parking nearby as well.
Though the ferries are supposed to be every half hour, we waited nearly an hour to leave the island and sure enough the second ferry was only 2 minutes behind the first.
They charge $7.50 for adults which isn't the worst price gauging, but you'll find way better service from ferries run in other cities for cheaper or even free. Each trip probably brings in several thousand dollars to the city, and it's clearly something they're using as a cash cow rather than putting the money back into improving the service itself.
But, it works.