We purchased a 3 day ticket on the ACTV website. Note that there are 3rd party sellers, so careful…read morewhen buying, because we saw one for 50€ that included taxi and restaurant discounts, that wasn't sold by ACTV. The pass can be used in land and on the island. Once we received the email we walked up to a Kiosk to figure out how to redeem it. The QR code that was included in the email did not work. We had to type in the confirmation code. Once the screen prompted the tickets. We selected and printed them out without issues. If you're on the island there's actual customer service kiosk you could go to and speak to someone. We were able to use the card to take the bus, and Vaporetto. We did not get a chance to use the Lido. Google Maps is super helpful, but I would strongly suggest looking at the screen, and map that is near each pickup location. We boarded one of the buses at 11:30pm, which ended up taking us 2 cities away from Venice, and was one stop away from calling it a night. They don't loop back to where they picked you up. Since the bus did not run again until 4:30am. We had to take an uber black back to Mestre. Expensive lesson learned. When you board a bus, or get ready to enter the vaporetto line. Scan the card without having your finger or hand over it. I made the mistake of doing that a few times and so it took a couple tries before it actually scanned. As for riding on the bus and/or vaporetto. It can get PACKED. Depending on the stop and time. If you're the first on the bus. You'll find a seat, but they have the AC off so it's HOT. Depending on time of the year of course. If you're one of the last to board. Expect to stand and hold on to something. It's definitely a cheaper way to get around, but if you're looking for comfort and space. Book a taxi, or water taxi to get around instead.