These are well marked in 4 places, if you can tell time you can read these markings, I will tell you it took me a minute to find them, but once I did I was pleased. I think most people know 1 is the circle a single line, 2 is the plus sign made of two lines, 3 is the wavy lines, 4 is the square and 5 is the star. These don't have to be in order, they can be well mixed and with one taken even hiden you can look down an in a second know what card is gone/selected These are also well made card that feel the quality we are used to from the US playing card company

Exactly what I wanted -- standard ESP cards with a nice, hidden marking system (I find some markings on other decks to be way TOO obvious). These markings shouldn't be noticed by anyone, despite being in four places. The markings are similar to a clock, so they're easy to read, although they might be too small for some people. (If you need to read them from across a room, maybe look at Eclipse.)

As mentioned, this is a set of FIVE cards, but with penny arcade I was able to get two sets for $1, which is what I needed for a routine.

This is a set of 5 cards, not a deck. You need 2 sets to do most magic routines.

They are Bicycle Maiden back and come in red or blue.

Also, the markings are easy to see with my glasses on - but not with them off. The markings are not in the standard corners, but the 4 center edges. They do not come with marking instructions, but Penguin will email you a PDF if you ask.

I am giving these a 3 instead of a four since they only come with 5 cards. It disappointed me, but I got them in the Penny Arcade.

I thought a "set" was going to mean 25 cards, which is typical for an ESP deck. This is just five cards, one of each. You can't really perform any routines with just five cards. If you want to perform any of the typical matching routines, you'll need two or more sets. Since it's just a five card packet, there isn't a tuck box. If there were full decks of these cards, I'd order one.

Got the cards without any routines or instructions for reading the cards.

I received this ESP set last night, and I can't quite wrap my head around the negative reviews. It says you get 5 cards and why would anyone complain about something decent for just 50 cents? The quality is Bicycle quality. I'm getting more.

The markings - I knew they were there but spent a good while trying to find them and came up empty, which is good. After looking at the reviews and comparing cards, I figured it out. The markings are cleverly hidden! They're not just circles or wavy lines; but they make perfect sense. You can read them regardless of how the card is oriented. Top and left match as well as right and bottom. Someone mentioned a clock, and once you locate the marks, you'll see what I am getting at. You could hand 1 or all 5 of these cards to someone, tell them they are marked and they will never figure it out without intensely studying and comparing cards. Check out the other reviews for tips on where to look for the markings; they're not where you might expect.

Grab these ESP cards before they sell out!

Marked ESP Cards for pennies on the dollar. Markings aren’t explained but they’re pretty easy to figure out on your own.

I have pretty good eyesight and still struggle to read these markings.

This is a set of 5 cards, not a deck. You need 2 sets to do most magic routines.

They are Bicycle Maiden back and come in red or blue.

Also, the markings are easy to see with my glasses on - but not with them off. The markings are not in the standard corners, but the 4 center edges. They do not come with marking instructions, but Penguin will email you a PDF if you ask.

I am giving these a 3 instead of a four since they only come with 5 cards. It disappointed me, but I got them in the Penny Arcade.