I have this case for my iPhone 4, which I will be giving to my daughter. I bought another one for the 4S I just ordered. This case is a must have for canoe trips, beach, around the pool, or just to use during the rainy season. It was easy to insert the phone and has three locking screwtabs to seal the case around the gasket. When I took photographs with the case on there was no dropoff in quality. The home button is accessible via a rubber fronting with a slight raised button. I saw very little difference in the ability to use the home button with the case on than with it off.
I am looking forward to testing this while snorkeling. Underwater photography is a hobby of mine, so I am curious to see if it handles pressure at shallow depths. If it does, it makes this case a double value. I will update this review after my first canoe/snorkeling trip of the year.. next week!
FOLLOW UP: I was finally able to test the case in my pool (while cleaning out the winter leaves!). I was able to dive down to the bottom ~ 8 feet, with no leaks in the case. I tried first without the phone in to be certain and then dove again with the phone in and no leaks at all. I then tried video and it worked great. You have to start the video before going under because the touch screen works on heat variation and being underwater makes it impossible for it to register your touch. But, I started the video above water and dove to the bottom. Not much to see but leaves, but the video came out great. Once it warms up a bit I will take this to the freshwater springs nearby and see about getting some footage of manatees.
Great product!