The cards are great.
Those saying the markings are easy to find for spectators are
definitely not using them correctly.
The penguin marked cards have far more obvious
markings on them as well, but nobody sees them if you do your job right.
If you use them
correctly, nobody would suspect that they're marked cards. If you use them incorrectly, some will
figure it out.
These are the best marked cards I've ever seen for mentalism. I've been
performing since 1989