What are the benefits of the ExcelWorksheetEvents class?

#region ---- Addin module code ----------------------------------------

private Excel.Workbook _activeBook = null;
private Excel.Worksheet _sheet = null;
private ExcelWorksheetEvents _xlSheetEvents = null;


private void adxRibbonSinkEvents_OnClick(object sender, AddinExpress.MSO.IRibbonControl control, bool pressed)
{
    _sheet = ExcelApp.ActiveSheet as Excel.Worksheet;
    if (_sheet == null) { return; }

    // Option 1: Use ExcelWorksheetEvents
    _xlSheetEvents = new ExcelWorksheetEvents(this);
    _xlSheetEvents.ConnectTo(_sheet, true);

    // Option 2: Create my own sheet_Change event handler
    _sheet.Change += new Excel.DocEvents_ChangeEventHandler(sheet_Change);

    _activeBook = (Excel.Workbook)_sheet.Parent;
    _activeBook.BeforeClose += new Excel.WorkbookEvents_BeforeCloseEventHandler(_activeBook_BeforeClose);
}

private void adxRibbonUnsinkEvents_OnClick(object sender, AddinExpress.MSO.IRibbonControl control, bool pressed)
{
    UnsinkEvents();
}


void sheet_Change(Excel.Range Target)
{
    // Option 1: Event handled in ExcelWorksheetEvents.ProcessChange()

    // Option 2: Handle event here
    string address = "[" + Target.get_AddressLocal(Office.MsoTriState.msoFalse, Office.MsoTriState.msoFalse, Excel.XlReferenceStyle.xlA1, Office.MsoTriState.msoFalse, Type.Missing) + "] ";
    System.Diagnostics.Debug.WriteLine("sheet_Change - " + address + Target.Value.ToString());
}


private void UnsinkEvents()
{
    // Option 1;
    if (_xlSheetEvents != null)
    {
        _xlSheetEvents.RemoveConnection();
        _xlSheetEvents.Dispose();
        _xlSheetEvents = null;
    }

    // Option 2:
    if (_sheet != null)
    {
        _sheet.Change -= sheet_Change;
        Marshal.ReleaseComObject(_sheet);
        _sheet = null;
    }

    if (_activeBook != null)
    {
        _activeBook.BeforeClose -= _activeBook_BeforeClose;
        Marshal.ReleaseComObject(_activeBook);
        _activeBook = null;
    }
}


void _activeBook_BeforeClose(ref bool Cancel)
{
    UnsinkEvents();
    if (_activeBook != null)
    {
        _activeBook.BeforeClose -= _activeBook_BeforeClose;
        Marshal.ReleaseComObject(_activeBook);
    }
}


private void AddinModule_AddinBeginShutdown(object sender, System.EventArgs e)
{
    if (_xlSheetEvents != null)
        _xlSheetEvents.Dispose();
}


#endregion

#region ---- ExcelWorksheetEvents ----------------------------------------

public override void ProcessChange(object target)
{
    string content = string.Empty;
    Excel.Range range = target as Excel.Range;
    if (range != null)
    {
        string address = "[" + range.get_AddressLocal(Office.MsoTriState.msoFalse, Office.MsoTriState.msoFalse, Excel.XlReferenceStyle.xlA1, Office.MsoTriState.msoFalse, Type.Missing) + "] ";
        System.Diagnostics.Debug.WriteLine("ProcessChange - " + address + range.Value.ToString());
    }
}

#endregion