The project is indeed a "game changer" for both Malaysia and Singapore. There are a lot of opportunities for both countries with the HSR linking KL and Singapore. Of course, for this scale and complexity of this project, it will necessarily involve a certain amount of intricacies and engagement between the 2 countries in order to work out the details of the execution.
But I see that there are a lot of mutual benefits for both countries with the HSR. As long as there is a political will on both sides to see through the project, it will happen.