ESP cards are essential part of my show warm ups. Picked these up and must say that they are
absolutely wonderful. I love the muted tones and grid backs. These definitely have a lab quality
feel to them. I tried hard to spot the method before reading the instructions. Came close but
couldn't nail the specifics - I'm absolutely confident a layperson would miss it entirely much less
suspect they are even marked. The marks, once you know what to look for, are fairly easy to spot
even for those of us who should be wearing glasses.
Bravo sir!