If you have a cutter that is clear around the cutter blade area you will know how easy it is. Just drop in the pen and drop the point on the reg mark. Its so easy you can stand back and hit the marks.
There is no need to stand over a cutter lining up a registration mark thru a cross hair lens all the while trying to operate a mouse. And, at the same time hope to have enuf light to see the material. There is a reason why the more expensive name brand cutters are so popular. They do not have issues that make it harder to operate such as lack of clearance around the cutter blades.
I find it interesting as one reads posts,,, that operators of the cat and bird cutters let issues slip out when it comes to operating in more than basic cutting modes. Either tracking errors, or software errors, or setting errors, or inability to contour cut accuratly all come to light. They love their machines in one post but then complain about some problem in another post. I love it..