IMO don't get the Lifeproof Nuud, does not work for Samsung Galaxy S4, needs a redesign.
Love this case, it is well built and protective, however it is not functional as a phone case.
I can also testify to the sound issues this case causes. Callers voices are muffled at best and very hard to hear clearly. Most times callers are unable to hear a single word I am saying and if they are lucky enough to hear anything the sound quality of my voice is terrible and muffled also. Some callers get an echo effect of their own voice back through the phone which can be very distracting. This case protects the phone well but makes it unusable as a phone.
I wrecked my first S4 by using it at the gym by getting some sweat on it so I needed a waterproof case. Bought this case and have been frustrated ever since by it's lack of functionality. Like I said earlier I love the protection provided but can't make or take a phone call with it on. Called Lifeproof and got the same run around, blow in the case solution to free the diaphragm, simply doesn't work. I then took the first case back and got it exchanged as they said there may be a defect with the case, replacement case has the same problem.
Like the protection provided so I have still been using the case and have resorted to ripping my phone out of the case whenever I receive or make a phone call, very frustrating and annoying for a $90 case, should work as expected. Wish I was one of the few posters who could report no sound issues. Finally had enough and I am moving on, going to try the OBEX case out and hope for better sound quality, although the protection looks more compromised when using the headphone jack. Will post results once I receive it in the mail. May even try the Dog and Bone wetsuit case although it appears to be only available in Australia.
So to sum it up, good case for protection if you don't use your phone as a phone, but if you need to make and take phone calls save your money and don't buy the Lifeproof Nuud. Lifeproof Nuud = garbage.