Wonderfully simple idea that works very well. The
different colors are a nice touch to have
different emphasis for textbook/notebook pages
that are important. I use a fine tip sharpie to
write notes on them and these hold that type of
ink very well. Other types of ink wash off, but
this is not surprising, given the material of
these stickies.The only gripe I have is I often pull two stickies
off, instead of one. However, I see even this as a
boon, since it means that these are very thin,
meaning there are lots of them per color stack.
When I eventually run out of these, I will
definitely reorder them.