Helsinki to Tallinn Ferry

Our Finnish friends invited us to go with them on a cruise with the company Tallink Silja, to from Helsinki to Tallinn. We went on the Baltic Princess, a giant seven-story ship. We found a deal for groups, so it was dirt cheap, and the trip included a stateroom with a prrivate bathroom - it was 64 euros for the roundtrip from Pieksämäki by bus and then the ferry from Helsinki to Tallinn and back, all inclusive. As it was winter, the sea was frozen so for two hours we had to stop halfway across, as the ship couldn't move. It was dangerous and inadvisable to go out on deck, because of the strong wind; if anyone fell overboard, there'd be little chance of surviving.