I love my Cameo! The only time I've had any problems is when I have inadvertently used the wrong settings (i.e. once I did not select a box that said I was using a cutting matte even though I was). I think most of the problems people come across are user errors.
I have had it since February and I am on my 3rd cutting matte. I am trying to remember to cut in different parts of the matte to see if that helps it last longer--I tend to just cut in the upper left corner and then that part loses its stickiness more quickly. I have gone through a couple of blades too, but I have cut fabric with my regular blade. Now that Silhouette has a fabric blade I will hopefully be able to use my paper-only blade longer.