I like how easy it is when creating presentations in Powerpoint or Keynote using our templates that we can easily add content from slide libraries! You cannot have more than one library attached at once so you need multiple people working together if there are many different types of resources required within your presentation (i am not sure this will be an issue since i think most companies do things as teams). We use Slidelibrary primarily because they allow us access through confluences "add new" function which makes uploading much easier then having someone upload all items manually into each page/slide individually before adding them back onto their own pages etc..