Robust, stable, lasting not too big and quite easily. The GEPE box accompanied me for years by half the world. The Extreme version is a little more expensive but much more durable than the simpler version (broke in the joint). Well, I think that through soft case, you can already see from the outside how many blank SD cards in what capacity are still if you become accustomed to insert blank cards with the label facing outwards and then turned over full insert in the box.