Solid!
The case is substantial but still small enough to fit in any pocket on my camera bag. As a novice with DSLR cameras I don't yet need to store 8 or 10 cards so this is just the right capacity. Truthfully, even if I go beyond the 4 card capacity of this case I will probably order another one just like it. The two cards I have fit tightly in the provided rubber-like depressions and the case shuts tightly. I can't vouch for it's waterproof qualities but I have no intention of immersing it to find out either. Highly recommended for those who don't need to store large numbers of memory cards.