In the wiki is now available the Syntax overview.
One of the challenge of this version was rewrite all failure messages to magnify the cause of the failing test.
Similar messages are available for all other assertions.
The next step.Should().Be. the syntax for lambda based assertions as:
const int y = 2;
const int z = 4;
4.Should().Satisfy(x => x == y * y);
2.Should().Satisfy(x => x == z / y);