Case#1 I received my first TAT7 Case about two months ago. I did as the instructions said and tested it in the sink and then tested it during a dive without my phone in it. It kept the water out so time to try with my phone in it. Well like several other have posted, I could not take pictures or start/stop video once I got deeper than about 9 ft. It seems that the buttons get very stiff and I couldn't push them down hard enough to make contact with the screen. I did manage to get several videos but the problem is that i have to start the video at the surface and the only way to stop it is to hit the home button. So when I wrote the company an email explaining the situation and within 24 hours they contacted me, apologized for the inconvenience, and told me they were sending a replacement immediately. I received the replacement case a few days later.
Case#2 Went through the proper method of checking the case and went out on a dive to test it before putting my phone in it. Within 15 minutes of getting in the water and at an average depth of 35ft the case flooded. Water appeared to be entering the case through one of the buttons. I took a couple of pictures to email the company along with the explanation of what happened. Once again their great customer service replied the same day and once again apologized, and told me that they would send the pictures and the information about seepage through the buttons to the assemblers. I wasn't ready to give up on the case yet so I asked them to just send me a replacement and they did without hesitation. I received case number 3 a few days ago.
Case#3 I tried to convince myself that there was no way anything could go wrong with a third case, but in the end I didn't get what I hoped for. Took the case on a dive today and tested it without my phone of course. Within a minute of being in the water I watched drops of water flooding the case through the red button. Stinks.
Going to write TAT7 an email and see what they can for me next. Probably just going to go for a refund at this point. Good luck if you decide to get this case. Gotta say though, the TAT7 customer service people are top notch, just wish their product was the same.