These are a bit more useful than the normal word balloons CC has created, but not by much.
If these balloons are scaled too far horizontally or vertically, the lines become too thick in one direction and too thin in another. And there is virtually no way to extend or shorten the tails of the balloons.
The one advantage these have over their normal balloons is that they can be used for short exclamations if the font is superimposed over them. "FIRE!" or "LOOK OUT!" But I can't see them being used for much else.