Indispensable!
I just LOVE this model of the Xyron! Although the refills are a little pricey, you can plan ahead to maximize the use of space on the sheet. I print off lots of batches of photos at once, and run them through the machine. Then, I just set them aside, and they are all ready to stick down once you get your LO all ready. The cost is definitely made up for in the convenience of this tool!