Why is weekly/fortnightly mortgage repayment better than monthly???

This question has been in my mind for quite some time.  Silly me, the fact behind is so simple...  I would like to share the explanation with you in the link below:

http://www.yourmortgage.com.au/article/fortnightly-vs-monthly-repayments-78306.aspx

It is very clear and easy to understand. 

Please let me know if it is incorrect.