NUnit's EqualTo tolerance modifier

Comparing generated DateTime values can always be a bit tricky, but today I discovered NUnit's Within modifier that makes life so much easier:

[Test]
public void CreatedOnDefaultsToNow()
{
   SomeClass someObject = new SomeClass();
   Assert.That(someObject.CreatedOn, 
      Is.EqualTo(DateTime.Now).Within(new TimeSpan(1000)));
}