Pretty incredible deal for .NET developers. You get the web forms controls as well as the windows controls. The web grid does expand/collapse and group by almost as seamlessly as the windows grid. One word of caution regarding the web grid control - if you enable view state on any dataset that has more than a few rows the view state will be HUGE. This causes sluggish response whenever you do a postback (group-by operation, etc.). So I turned off view state and had much quicker response getting the data from the database on every postback. However you will loose the ability to do some things such as group-by if you disable view state.