I love this punch. It's so unique, and very simple to use. You can make either 4-inch or 6-inch borders, and it comes with a template to cut your own circles. It looks like it could be hard to use, but is really quite simple.
I bought this for valentine's day cards this year, unfortunately I couldn't quite get the handle of it...I had to go a completely different direction with my cards instead. I guess I need more practice.