This is a great little tool. The tab on top flips up and twists around to change from a small corner to a large corner. No need for two rounders with this tool - it's all in one! And it works really well.
Seems good. I haven't used it very much yet. I like that is does 2 sizes of corner.
I bought this because it seemed more convient than other tools, having two and spending more money. It's not bad, but it really does take practice! You need to make sure there are no leftover paper pieces in it and you have to get it in the punch PERFECTLY! It's not easy, but i'd say worth the hassle to save the precious scrapbooking funds!