No use, if you put value on clean, straight and precisely placed incisions: impression after the first cutting trials.
Reason: the used materials are not stiff enough to keep the cutter head while cutting exactly in the guide. In addition, the rail on which the cutterhead running along, stored for too wobbly. Even with a lot of tweaking you do not manage to keep the pressure high enough to achieve an acceptable cutting results. You could use a third hand very well.
At the end of the device always distorted, the average deviates from a straight line. Often levels occur in the cutting edge. Whether thin or thicker paper, photos or cardboard is to be cut, it changes everything nothing.
Moreover, the knife collides happy times with the leading edge of plastic, hooked there firmly and ensures an annoying Geruckel and very unpleasant noise.
Too bad, with a little more quality use the could have been an excellent device, stable and smart. But it is completely useless, no matter what the task.