What are the benefits of Chapter 13 bankruptcy?

Many people find Chapter 13 attractive when 1) they have fallen behind on mortgage payments on property they wish to keep; 2) they face tax debts that cannot be discharged through Chapter 7, but can be included in a 13 repayment plan; 3) they wish to protect property that is not exempt from bankruptcy; 4) they have already filed a Chapter 7 in the past eight years; 5) they want to protect cosigners of some debts; and 6) they have an overdue student loan (which can also be included in a 13 repayment plan).