I had been a little afraid of coluzzles for a while and finally last month splurged. I have the alphabet, oval, heart, regtangle, shell, and I've just ordered the tag from Shapemakers (also can be used with Coluzzle systems) and I'm totally addicted. It does take a little practice. A few tips: be sure to keep your knife straight up and down and make sure to remove the plastic sheeting off BOTH sides of the template before using. It's the greatest for making my alphabet that I've found so far!
Lisa