We took the King Express Sapa train from Hanoi to Sapa (Lao Cai). The train was olden days train so the ride is very bumpy and the railway is very close to shops and housing area in the city. To our surprise the bed is comfortable, pillow and blanket provided.
They also serve hot coffee in the morning.
It was a bit scary when the train emergency brake about 11 pm and completely stopped for one hour. We asked what happened, but the crew doesn’t speak English. It was relieved when it started to move again.
I heard that train service is always fully booked because the arriving time at Sapa is good at 630am, so you don’t waste another day in Sapa.
Source: Shermaine S – TripAdvisor