Hard cases are essential for the musician that takes their guitar to gigs or travels around with it. This is because, while some soft gig bags are very effective, they cannot offer that extra high level of protection needed. This allows your instrument to be much more safe when you're on the move.
Hiscox cases are extremely durable and sturdy to the point where you can stand on them and they won't even be tempted to break. They claim that their products have around a 500kg crush weight!
Flight cases, as they are sometimes called, can literally be used as a suitcase for your guitar to be put in an aircraft hold. They offer that much protection that you can feel comfortable and not have to worry about it on planes. This is ideal for the traveling musician.