Spiral Wire & Plastic Coil Binding — Better Than Perfect?

"Undoubtedly, the greatest advantage of spiral binding is that when opened, the book lays flat," explains David Spiel of Long Island City, NY-based Spiel Associates. "Lay-flat perfect binding was supposed to put an end to mechanical binding, but it hasn't because it doesn't really lay flat. Books bound with plastic coil, spiral and double-loop wire can also be folded over for easier use."