Great adventure. We booked the VIP berth for 2. There was plenty of room for us. There were snacks, soda, beer, and toiletries. The staff was very friendly and helpful. As expected the train noise was present as was some rocking and rolling but we had no problem sleeping. Lots of fun. Highly recommend the VIP berth!
Review Link: https://www.tripadvisor.com/Attraction_Review-g311304-d25070205-Reviews-VIC_SAPA_TRAIN-Sapa_Lao_Cai_Province.html