I like the dual layered protection that you get with the Otterbox case. It is a hard plastic case, which includes a screen protector. Then you put a rubber case on top of the plastic. This provides some extra impact protection and makes it easier to grip.
The only things I don't like about the case are the size of it (it's really bulky). I also don't like that it seems like the screen always develops a "watermark" look. There isn't much to do about the size of the case. You could use the included belt clip to hold it, or you could carry it in a cargo pocket like I often do. As for the watermark, I've found a couple short term solutions, but nothing permanent.
Here is a video about how to install the case:
Here is another video that explains how to remove the watermark. It won't last forever, but it will help for a while and it will help keep your phone clean anyway:
Here are some of my other review posts:
Columbia Cougar Flats II Tent
Humminbird 768 Fish finder