Just to add:
A ListView control will show check boxes, and has many other nice properties, but it takes a bit more work to set up the data than the DataGrid.
As far as check boxes for the DataGrid and Flex grid, you can position a check box control array over each cell, but it takes a bit of work when repositioning. Better would be to format the column as True/False or Yes/No, and show a check box only when the user click on a cell.
The DataGrid does not have individual cell formating (Font and color) properties like the FlexGrid, but is handier with data input, and faster when loading larger amounts of data and can be fully bound to a data source.
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