For strips, regular blocks, I can't say enough for the ruler/rotary cutter combo from Fiskars. It is a 6 x24" ruler with cutter, all one piece. It cost about $24 with a Joann 60% coupon. ($60 regular price). You barely touch on the cutter as you pull or push it (2 layers) and I have cut through 8 layers before. Don't know how I lived without it!!