I am looking for an alternative to guest sign in books, I mean I like that my guests will be able to write us a message, but I feel like it will be a book that will get lost in our house. So I found an alternative, its a picture frame, with a sheet of metal around it, and it comes with a special pen so when the guests write on it, it permanently engraves their message into the metal. I haven't been able to find any reviews on it, and it's pretty expensive so I wanted to see if anyone has used it, or seen it at someone else's wedding? Here is a link if you'd like to see it. http://www.jessicaswedding.com/Personalized-Signature-Frame-Elegant-Style/productinfo/DS4511/