Prevent grooves from forming and ruining your paper.
Probably the biggest frustration I have experienced with paper cutter machines is dealing with the wear and tear caused by the blade. Some cutters begin to form a groove from all the cutting. When this happens, it can cut your scrapbooking paper apart or leave some rough edges. I have wasted a fair amount of paper due to this problem.
I recommend that you look for a paper cutter that actually has a self-healing cutting mat. With this type of mat, you won't have to worry about grooves forming.
Some cutters have a mat that can be flipped anytime you're no longer getting precise cuts.
In addition to the self-healing cutting mat, you want to make sure that the paper cutter can handle paper of different textures and weights. Otherwise, if the paper is too heavy such as card stock, or has a smooth texture, such as vellum, the blade will cut your item easily. You should also consider that it can even handle extra-large papers when you need them to.
Owning a scrapbook paper cutter is very beneficial if you're going to do a fair amount of scrapbooking. The cutter will save you lots of time and bring a new level of precision to your next scrapbooking projects, cards, etc. You are definitely getting your money's worth back! If you choose to purchase a cutter that utilizes rotary blades, start out with just a couple of blades. You can always purchase additional blades later on though some cutters actually come with at least two extra blades.