Again, simply the best we've found to date. Carl offers their professional series rotary cutters in 12", 15", and now 18"...for those of us who are involved in projects that involve cutting multiple layers of paper or cardstock, this is heaven!  Also, for those of us who have a need to cut matboard or other thicker media, this is is your answer. While we don't consider this cutter portable, it is a fabulous addition to your workspace or studio for projects that can't be accomplished efficiently or timely with other products. The personal trimmers available on the market are great basics, but the Carl Professional cutters expand your cutting horizons to a new level. Many of our instructors own or want to own this product because of its ability to save so much time spent on cutting, as well as its ability to cut thicker media. Come in and check this one out; then you'll understand the great advantage to having one of your own!