This is probably the most rugged cased on the market, and since I have a job where I work outdoors and don't want to worry about breaking my phone, I picked this one up. I could not be happier with my purchase! I only dropped my phone once (on accident) and both the phone and case were fine.
The case is polycarbonate and has a built in screen protector, so it protects your glass and your phone, unlike the cheaper cases that just protect the phone. The screen protector on the case still gives the phone a very sharp look and does not have a negative effect on appearance or touch sensitivity. The plastic case sits in a silicone case to help absorb more shock so that it doesn't get to your phone.
All of the buttons as well as the usb and HDMI ports are easily accessible through the case. The case has buttons to link with your camera and volume buttons, so if you need to take a quick picture or turn the voluume up for your tunes, you won't need to take the case off.
Overall, this is a very durable case, and if you want to save yourself the stress of worrying about a broken phone, I would pick one of these up. The case does add some bulk to the phone, but if you can put up with a slightly larger phone, this is for you.