LOVE all my sizzix machines! I have the original red dinosaur (2 in fact! bought the second on clearance!), sidekick, and big kickk. LOVE em! Would be lost w/o them. They're quick and easy to use, don't require sticky sheets to cut with, don't need new blades, can be used when the power's out (happens here a lot!), can cut any dies out there, and don't take up much space. Anything I've left out?
Only cons I see- cost of the dies and inability to scale the shapes as needed.