We don't charge to the room, but since we stay at Shades of Green (not an official WDW resort), we don't have that option. If I did have the option, I would sure use it!
Also, it depends on your circumstances. We are a group of 4 women traveling together, staying in a suite. It would be too hard to charge to the room, since we would have to try to sort out whose charges are whose. Much too complicated. But if it was just me with my family, I totally would!