I seriously love this thing. It's easier and quicker for me to use than tracing a template because I can cut the paper to size, score it, cut the corners, fold it, glue it, and I'm done. I also love that I can use it to make a nice clean fold line instead of having to score the paper with an Xacto knife and worrying about cutting too deep and cutting the paper in half. I have gotten so much use out of this, especially after using it to hand make all of my wedding invitation envelopes and using it to fold my homemade wedding invitations in half. The best part of hand making my wedding invitation envelopes was that I could print the address directly on the 8.5" x 11" paper (blue paper to match my wedding colors) instead of having to hand write each address or use labels.
But back to my more recent envelope activity:



