I will leave a review even if we didn't pay for a ride, we just walked to the top so we can wait for the tram and take pictures with it. I have no idea how much do you have to wait for the tram to get up if you don't find it there when you arrive, because when we got up, it was already there. The driver gives you a good couple of minutes to take photos with the tram before heading back down. We loved the spot and I think it's a total must if you ever get to see Lisbon! I don't know if paying for the trip is worth it, but if you are walking through the Bairro Alto neighbourhood, you have to go to the top for some very nice photos :)