I've always had good luck with this machine, and actually went on-line tonight to see if I could buy more of the extruding disks to make gnocchi, ziti, etc. When I saw the negative reviews I was shocked. I'm sure the folks that said they couldn't get it to extrude did slide open the shutter in the bottom--the shutter is closed while the stuff is mixing, and you slide it open to let the blade squeeze the pasta out to the extruder once it's mixed. And, if the mix is very dry, it sometimes forms a crust on the bottom that keeps the rest of the mix from squeezing through--open the machine up, break up the crust and add a little more water. BTW, there is nothing like the taste of freshly-made pasta.
I have no financial interest in any product I review.