Great Product - back glass and videos are a little off though
Overall, this is an amazing product that worked perfectly for me on a kayaking trip with the manatees. I took it on this trip to really give it a run in preparation for a project that will have me shooting in backcountry conditions with various degrees of mud, dirt, rain, and water crossings.
After shoving my camera shoulder-deep into the river for a whole day, I do not doubt that this case will make sure my camera survives the journey.
That being said, I have two main complaints. The back glass is not as adjustable as advertised. It was offset from my viewscreen to a degree that I was largely shooting blind, even above water, and only adjusted in the wrong direction. (I shoot Nikon Z series cameras where the preview screen is left offset) This could be user error, but I don't see how.
My second complaint would be the instructional videos. They assume you know what each part is before you start assembling the case, and don't show you at all how the back glass is supposed to attach. They seemed to mostly discuss the versatility of the product and only show how to put it together for the first time as an afterthought. This led to a pretty clunky first install for me, having never used a submersible case before.
Overall, I would still recommend this product, especially as a more packable option for longer treks. It would be nice to have an intro-kit back glass option that swings right AND left to lock into place over multiple style viewfinders, though.