Translation of effectiveness in German

In the coming morning we were picked up to do a day tour in the Mekong Delta. It included several stops all around the river bed and the delta of this huge river. The first station were floating villages.
The bus driver drove so quickly and with extremely dangerous maneuvers. We were so afraid and the other passengers started to scream at the driver which did not help the situation at all.
The same night we went to a great restaurant in town (near the main street). We met a very friendly couple in their fifties from Buenos Aires. They told us many interesting stories about Argentina.