The flat design is great as it can be easily plastered along the side of a carryon, taking up no noticeable space.
It does not hold a ton of jewelry, but since I try to travel with only the most basic pieces of both clothing and jewelry, this case turned out to be the perfect choice.
I bought it for a recent trip that took me through 3 countries and 9 airports and it was the perfect thing. No tangled jewelry through any of it!
Also great for bringing home any jewelry you might find in your travels ;)