I am using this as a printing surface for my 3D printer.  I saw the name brand poly printing surfaces and did a bunch of reading and ended up here for $5 instead of there for $15.  Overall I am very happy with it.  I cut it using a metal straight edge and initially cutting with an XActo knife blad.  Then I reversed the blade and scored over and over making sure to cut fairly deeply in the front and reverse sides before trying to bend and snap. I am holding it to my print bed using binder clips and it is working fine.  I read where people said they could print PLA with no heated bed but I could not.  I tried none, and then low bed temps and always got curling and failure to stick.  I went back to the 55C bed temp that I had been using for blue painters tape and it sticks fine.  I was worried that I would not be able to get the part off the bed when finished but so far it has been easier than painters tape by far.  I haven't tried ABS yet but PLA works great.  If  you have trouble getting your part to stick just up your bed temp a little and make sure the nozzle is pressing the bead into the surface.  if the bead is round the bed is too low.  If the bead is flat then probably too high (you don't want the nozzle to hit this surface).  If the bead is oval and flattish but not completely flat then it should stick just fine.  If you still have issues just clean the surface lightly with alcohol and then dry completely.