Info: Today, I did real deck memorization by 2 Card Block System, and the results was too demotivating to the point, I should just leave this system. Since memorizing and telling single card to someone is too difficult in it, I have to tell everything in reverse order than what I memorized. It might get better with practice but because of it I have to memorize in more than 1 min + times.
But then I tried again faster sub 30 sec speeds but this time I brought second deck, and I arranged cards in it, this was way much faster than speaking. I mean organizing cards process. So if someone is trying 2 Card Block System, you should be aware about it.