The new filter row is great, but the sizing of the filter controls is really bad. If the columns are wide, space is wasted, and if they are narrow the filters are almost unusable. Here's an example implementation that takes care of resizing the controls when the columns resize or when fitlers are applied: http://jsbin.com/wipazupexaqi/3/edit

Also, for further reference: http://www.telerik.com/forums/grid-filter-row-auto-size---solution