Well it's not really a question of being good. The scripts were written to extend Blender. There are many useful scripts that do what Blender can not yet do natively or similar things in different ways.
For example my Layer Manager script extends Blender so that you can name layers and create layer groups (and a few other things) where as Blender "out of the box" doe not. There are in fact a few scripts that are quite handy so you might want to nose around in them at some point. Don't forget that the scripts are separated into categories and are accessible not only from the scripts window but from the menus. If you are in edit mode you get the list of edit mode scripts, if you are in object mode you get the list of object mode scirpts, and so forth.