i really recommend this case. it is pricey, but it is durable and dependable. I have dropped my phone numerous times and i haven't had to worry about it. Otter box is a great brand name and they make their products well Voice Quality doesn't interfere with sound Battery Life not applicable Design it isn't as bulky as you expect
I bought this otterbox just to protect my iPhone 4S from drops and bumps, and it protects it well. It's also not bulky which is great. My only complaint with this Otterbox is that the opening for the charge port is not wide enough to fit a charger that is not made by Apple. So, I have to remove the bottom half of the cover every time it needs to be charged by one of my non-Apple chargers.