*WITH THE PROPER PRECAUTIONS AND CHECKS* I found this case worked and was easy to use. I definitely recommend it.
The warning is:
* TAKE THE PROPER PRECAUTIONS
* MAKE THE PROPER PRE-DIVE CHECKS
* YOU ARE ON YOUR OWN
* GET FLOODING INSURANCE OR DEAL WITH THE CONSEQUENCES
I was advised from the beginning to take a course on underwater camera maintenance and use, and to get flooding insurance. I still accept that despite my best efforts, I'll get flooding. The insurance will protect me. You *cannot* assume that a manufacturer will warranty an underwater housing against leakage. It's not possible. Even a tiny bit of sand on an O-ring can cause a leak, and at 60 feet the leak will let in water at twice atmospheric pressure.
Fancy underwater housings for $1000+ cameras are *not* warranted against flooding. Don't expect that a $170 housing will be. Don't blame manufacturers for your complete lack of knowledge and experience in a very specialized photographic discipline that most divers take years to learn.
Get flooding insurance. Learn how to protect your camera. Test the housing. Ask other divers.
The only possible limitation is that the rated depth is only 100 feet. But considering this housing is only $170, and an Ikelite pro-level housing is $500+, this little gem is a great deal.
Two other suggestions: One, you want to be sure that there are no small objects on the o-ring, even hair or fluff or that fine fabric stuff that kind of floats in the air. Two, you will want to assemble the camera and the housing in an airconditioned space before the dive to minimize the potential for fogging. Once assembled, leave it assembled until the battery runs out or you have another reason for removing the camera, as each time you seal the casing you risk a flood.
Overall an excellent product that needs to be used with care, but that performs excellently (and is positively buoyant so it will float if you drop it over the side of the boat!).