The underwater device worked, and we got some awesome footage! Just keep in mind that you still want to be gentle while operating under water, to avoid any potential leaks. John instructed me to test it with a paper napkin each time before using and that was solid procedure. It might be a good idea to measure your camera, our DSLR was a tiny bit too small for the case, which made reaching our short lens through the front finger holes slightly harder than was probably intended. Regardless, it totally got the job done. John was great.