As a teacher I encourage my students to write and publish books. The comb binding spines create a wonderful 'published' book format that is quick and easy.
Bought the binding clips to make children's journals for a church project. You really have to adhere to the page limit because we noticed that the closer you approached the 55 page limit the easier it was for the combs to unhook. We never filled the clips to capacity maybe only 30 sheets even that was pushing effectiveness. Overall good for lightweight 10-20 page projects/presentations.