I am not a fan of iPhone cases mainly because they make the phone thicker and aren't always easy to work with, but I always put my iPhone in a Lifeproof case when I head into the desert to do some Slot Canyons or explore some abandoned mines. It has come in very handy because I can take pictures without having to worry about my phone getting destroyed from sand or water. I have even had to use the phone's light a few times while hiking out of a slot canyon in the dark because my friends forgot to bring their headlamps or visa versa.
Protects from Water, Sand, drops, etc...
doesn't add to much thickness to the phone.
Doesn't need a special adapter to change your phone.
Comes in tons of awesome colors.
You can still use the Touch ID.
Lifeproof will warranty your phone if the case fails IF you purchase the case directly from Lifeproof only and pay the $10 or so to get the warranty protection.
You HAVE to use a long dongle that screws into the case to use the 3.5mm headphone jack. Big Fail on Lifeproof's engineering team!
Sound is slightly muffled.
Adds some bulk to your phone.
The case is expensive.
Lifeproof does not warranty your phone if the case fails (this happened to my friend).
The plastic can degrade the sharpness of your picture.
Overall this is a very good case and I will continue to buy them whenever I upgrade my phone.
The Fre is good for the occasional case use like I use and full enclosure and protection.
The Nuud case is good if you are going to constantly use the case and never take your phone out.