I believe that you do respond to feedback from your customers and therefore I just want to add my voice to it.
I believe that it is an important future to add to ensure that the grid provide a complete solution. Other points which was mentioned in other posts is the ability to grow a row to fit the content and to vertical align it, which I also believe is important, as well as the ability to set the height for an individual row.
The lack of some of these features can lead to the result looking less professional. Just my six pence!
