It is a little pricey ($49.95) compared to some cases, but in my opinion it is worth it! There are sleeker sleeves and fabric cases if you are looking to be stylish, but if you are looking for protection, OtterBox is the best bet. Reviews say that the Defender Series can supposedly be dropped into a puddle and still protect your device, but the company's website says the case is not waterproof.
If you are looking to be stylish, this case comes in several different colors (blue, red, black, black/white and black/pink). It has a nice felt lining inside of the case, which just seems to cushion the back. My favorite part of the case is the front membrane. It helps to keep your screen clean and it is very receptive. This membrane is made in a way that it doesn't cut down on sensitivity and it doesn't get 'bubbles' under it like a lot of other cases do. The case also comes with a holster to clip on to your pocket (right) or you can use the holster for hands-free viewing.
The OtterBox makes the iPhone a little bulkier, so if you are looking for a sleek case, this isn't your best bet. OtterBox makes other cases such as the Commuter Series
, for three levels of protection ($34.95), and the Impact series, for a slimmer protection ($19.95).
I think having a case like the OtterBox is very necessary. If you are willing to spend hundreds on a phone and data plan, then you should be willing to protect it. It is a small price to pay for the confidence in knowing that you phone is protected.