The LifeProof Case's
claim to fame is that it's very tough (waterproof, shockproof, dirtproof, and snowproof, the company says) yet it's slimmer than virtually all the other tough cases out there, with an integrated clear plastic shield that protects your screen (and, obviously, seals your iPhone into the case). Also, according to LifeProof CEO Gary Rayner, the case cost $2 million to develop.
After trying it, we have to say it does strike an excellent balance between sleek looks and toughness (yes, it totally waterproofs your phone). The one small flaw worth mentioning is that the headphone jack is recessed, which means that with most headphones and earphones the plug simply doesn't fit and you have to use the included adapter. This one's drop-tested for 2 meters (6.6 feet) and is rated to go underwater to 2 meters.
For those wondering about the sound situation, not to worry: the back of the case is designed to augment the bass of the iPhone's speakers, and we had no problem playing a movie or hearing ringers with the case on.
Except for that small issue with the headphone jack, this is a really a great case. The only downside: it's expensive.