I can't say enought about how much I love this die cutter. I own the Sizzix and the Cricut, which I also love, but if I were to only pick one, this would be it. This is for several reasons.
Cost - the price is cheaper as are the cartridges. For the price of two sizzix, I can get an entire cartridge. The Cricut offers the same value, but this is half the price of a cricut cartridge and you get at least one alphabet with each shape unit. The cartridges also have designs where you can make the embellishments they sell. All you need to add are brads clips and ribbon and you can have the complete set.
Size - the size of the unit and the design cards are small. I am storing my cards in a pocket in my scrap carry all tote and have room for the two more I need and more. The unit itself is about a third of the size of my sizzix and cricut.
Versatile - Making Memories designs are diverse, coordinated with their product line and when all is put together you have a scraptastic page. You also do not waste paper, for you decide where it is to cut. You have the additional option of using the negative space right on the background page. With other units you need to cut the paper to fit the die and then paste the negative spaced embelishment on the page.
The only downside I have expeirenced is that I need to replace the blades more frequently. This could be only because I need to learn how to adjust the pressure better. However for the same price as two cricut blades you will get many more with each purchase.
For the money, the size and the value you cannot beat this machine. Like I said, I just can't say enough.