These little bookends are great -- they are the right size and weight for what I needed, and i like the fact they're non-skid. I also like the fact they don't look exactly alike, the only issue being that it was hard to place them in a way that showed them off to full effect. It would be nice if all the sides squared, so that any side could be used against the books. But it's a small issue and they are otherwise perfect. I would not use them for heavy books, though, as they are relatively light-weight. I wasn't sure what weight I would need for the books, but now I know that more than 3.5 pounds would be needed for bigger, hardcover books.