I have been buying them for over 20 years. In America, they are called Q-Cards and were once used to note the important points of a speech. In Greece, they were used for customer tracking cards. I use them for my daily schedule (the Google agenda is good too, but nothing beats having paper in your pocket). Consistently good quality, heavy cardstock, absorbs ink without smudging. I usually stock up for 1-2 years out of fear they might stop producing them.