Great cutter! I got the 17" manual model; it'll do huge stacks of paper all at once. I bought it to cut various wedding stationery (invitations, RSVPs, programs, menus, name cards, etc.), and bought this 17" model specifically so I could also trim stacks of 11x17" posters; the cutting edge is indeed long enough to trim a 17" piece of paper. There are two reasons I'm giving this 4 instead of 5 stars - both minor annoyances which can be worked around easily enough. One is that the grid printed on the flat surface is very very slightly misaligned to the blade - by about a sixteenth of an inch across the 17" cutting edge. The other is that the farthest end of the blade doesn't actually lower all the way, so if you're cutting a single sheet of 11x17" paper unless you've stacked a little scrap paper under it. Not dealbreakers, easy to work around. This cutter is a good value for money.