Here is the video I shot using the AEE S71 on a 100meter diver.
This is my second S71. The first one flooded on its first dive ( 50 odd meters) and it was replaced with out question from the NZ importer (full disclosure I am an agent for them).
I have had some other issues. One of them being fogging ( never used desiccant). But this is something that will happen to any camera in the same situation. If you assemble the camera into the housing in a air conditioned car/room it will not be an issue. It was never an issue in my trip to Bali with 5 or 6 dives with the camera.
Also the S71 has an inbuilt fan to cool the processor. The exhaust of the fan vents around the lens so defogs the front lens. Pretty smart really.
The other issue I had was the camera reporting a card speed error during the 100 meter dive on the assent. I had to turn the camera off then back on to get it to work again and then it did the same thing several times. It came right during the shallower stops. It has never done this before and I am unsure why it did it at all. The card I used was a 16 or 32g Scandisk ultra class 10 shooting at 1080 30FPS. I have also shot at 1080 60fps in the past and never had the same issue. It also does 4k.
Also the "100 meter" housing back went concave at about 60-70 meters, so much so that the back pressed against the LCD display. While it lasted the dive with no issue I am not 100% confident it would last continuous dives to this depth.
But, I believe if you use the camera with out the LCD this issue will be minimized since there are internal rubber buffers more centralized to support the pressure. Plus you can buy new backs for the housing if they show signs of stress.
Last issue is that it has a power switch on it that must be activated before put in the housing. Once in you can also put it in sleep mode. But if you left the switch in the off position you can not turn it on under water. Mind you, you would need to be a fool to forget to do that on land!
All in all I really like the S71.
https://www.youtube.com/watch?v=R6w8zOH7vLw