I thought the idea was original, but if you insert booklets from the outset all integrates, can be hard to describe the left side. The black rubber band leaves its mark on the hands and thus also very fast on the sides. Whether the binding lasts as long as promised, I can not say, but the venture after the first traces of very doubtful. In this respect, I find the system totally overpriced, a decent Moleskinebüchlein me as still prefer.