I got the flip-over case and apart form shoving it in a soft briefcase when travelling, that is all I use. the flip-over case has a very firm front cover (why is the logo on the back though?) which should protect it from most things. The case may also give some limited protection if you drop it, but I won't try that if you don't mind
Glass is usually more prone to breaking if you "attack" the edges than if you whack it on the front.