I have the UAG AERO and the Seidio OBEX. The Aero is a very slim yet durable snap on case that matches the GS3's style and color perfectly, it's easy to forget that I have a case on the phone. The AERO is my every day case and it was well worth the $20 I spent on Amazon. Now, onto the Seidio... I bought the version that Seidio makes exclusively for Best Buy stores under the name Platinum. This case is amazing, plain and simple but at a hefty price tag but we'll get to that in a minute. The case is drop, shock, crush, rain, dust and wind proof but the real draw to this case for me is that it is immersion proof in 3 meters of water for up to 30 minutes. That being said, I filmed over an hour of video at 15-20 feet under water while snorkeling. The GS3 stayed completely bone dry and worked perfectly. The case definitely adds a little bulk but is still somewhat streamlined and due to it's polycarbonate exterior slips in and out of my pocket effortlessly. The case is hard plastic overall and utilizes an "air suspension system" via foam pads on the interior. Every speaker/microphone is protected via a hydrophobic membrane which allows sound to pass through without distortion. The charge/data port and headphonne jack are accessible via silicone plugs and the camera and flash are protected by optical grade glass so your pictures/videos still come out crystal clear. They even applied micro dots to the inside of the screen protector to avoid the watermark effect you get when it sticks to the phone's screen (anyone who's had an Otterbox Defender knows what I'm talking about). The only downside I can think of to this case is the slight bulk and that it doesn't offer much in the style department, it's more utilitarian in appearance like something Batman might have on his belt and there is only one color option, black. So now to the price, Best Buy carries the case for about $70 and also has a holster option for an additional $20 and they are sold separately (no combo deal). This truly is an impenetrable case and much less bulky than the Otter box Armor series. Hope my 2 cents helps somebody out there.