I have tried several times to install Windows 10 on my new MBP 2018, and I have failed till now.
I used Windows ISO version 1703 which was ok until an error appeared at the end of setup (the error was:"windows could not update the computer's boot installation. installation cannot proceed").
Then I found an this Problem Installing Boot Camp Windows Partition on new Mac Pro. I followed the instructions according to this answer https://apple.stackexchange.com/a/337929/321893. Every thing went well until the Windows installer started. At that stage the trackpad and keyboard did not work, and I could not do anything. I had to force shutdown by pressing the power button.