I haven't used this yet and since I"m a 12x12 traditional scrapper not sure yet how I'll use this but I'm sure I'll find a use! It was a good price (it was a special) that day and decided it would be useful to have. I think Project Life and pocket page scrappers would really be able to use this. Very easy to use and I hope to find more uses for it.
There are a few tools that you will go to over and over if you make cards, scrapbooks or mini albums, this is one of them. Makes a neater notch than trying to align a circle punch half way. This giives precise and equal notches every time.