My wife and I each had a Singapore Tourist Pass from our last visit in 2015. As we had topped up the balance previously rendering the cards to normal EZ-Link cards, their validity was extended until 2021.
As our hotel was located just above the MRT station, travelling on the trains was a handy and viable option for us during our Singapore vacation. The train service was prompt and efficient and wait times were negligible. The coaches were spick and span and well-maintained. We were touched by how often other younger passengers would voluntarily and graciously give up their seats for my wife and me. That we are grey-haired seniors must have been an obvious factor.