Definitely WhatsApp Tuan before going. We let him know the night before and he recommended arriving at 8:20am for the 8:50am and 9:20am train that passes through. We arrived only at 8:40am because he have 2 kids and the policemen at the barrier stopped us and would not let us through. They were being incredibly difficult and I’m not sure why but I called Tuan and he came over to speak to them and they were not having it. We hung around for a while until we managed to slip in when they weren’t paying attention. Tuan was incredibly helpful, hospitable and sat down to talk with us. We loved the decorations and ambience and you have great views of the train passing through. Loved the salt coffee and vegetable spring rolls. A great experience. After the second train passed through we had to wrap up and leave as the policeman was not happy when he found out we had made it through. We feel incredibly lucky to have experienced it and we have Tuan to thank for that!