People keeps complaining that web grids are slower and more difficult to use than Excel.
We definitely need a radgrid control with excel-like editing.
Ideally we need the look-and-feel of the radspreadsheet, with the fixed columns of the radgrid, the events for updating a database, and maybe direct databinding to a database table.
What they want to see is Excel. Like the MS-Access UI, when they move (with keyboard) from row to row, they expect the database to get updated accordigly.

It would be very useful if the GridDropDownColumn had some way of accessing the database value of the control when not in edit mode. It is very roundabout to have to add more controls or hidden fields just to access data that was already pulled from the database. Some kind of function that could get the value which corresponds to the shown text would be exceptionally useful.

The GridCheckBoxColumn cannot handle null values in a bit field. 

I would like to be able to bind the checkboxcolumn to a bit field that allows nulls. The checkbox should be checked when the value is true, unchecked when it is false, and filled when it is null.

The current solution is to use the RadButton inside a GridTemplateColumn and add custom togglestates, but this solution is not documented and it is very time intensive for something that should be quick and simple. It requires a lot of coding to update or insert a record.

Between filtering is not working when RadGrid is bound to ClientDataSource. Trying to programmatically filter a date range will cause a JS exception.

The problem for which the bug was opened was not actually caused by the RadGrid. It was triggered by wrong configuration of the test sample. The parent container which held the grid had disabled ViewState in which case it is expected for the filter values and filter functions to not persist.

I would like to suggest that a more intuitive clear filter option be used on the Filtering columns in the RadGrid.  Currently, I have to select "No Filter" from the Filter list of options.

Instead, I believe the Filter should be provided to be more intuitive similar to other applications such as Microsoft Access, Excel or Google Search.

In Microsoft Access or Excel, I simply unselect the Filter icon to remove the Filter.
In Google Search, I simply click the X icon next to my search criteria to remove my search text.

Either of these methods should be adopted so that the overall end user experience is more pleasant and comparable to filter capabilities in other tools and products.

When the grid has no paging and all the groups are collapsed its good to have a paging defined within grouping to display all the groups in the same page as well can browse through the items within the group with paging defined.

As per the current implementation of the RadGrid control, if we set the CurrentFilterFunction, that will be used for that column and even with no value, the same filter function will be used (specified in the CurrentFilterFunction).

This is not user friendly and one should expect that "NoFilter" will be invoked when there is no value.

There is no possibility for invoking the "NoFilter" command when the following properties are set:
ShowFilterIcon = False and AutoPostBackOnFilter = True

please refer the following link for more information:
http://www.telerik.com/forums/filter-not-resetting-if-filtervalue-is-empty-in-client-side-filtering

Ability to add custom buttons to the command item collection.