Garmin 795/796
So maybe there is some hope that I have only gotten defective units. I haven't had a chance to try the last 796 in the cockpit, yet.
Regarding Jepp Charts, nobody at either Company seemed to know the answers, but try this and you may be pleasantly surprised.
Make sure you call Garmin and have them GIVE you an unlock key if you previously had a 696. If not then buy the key. Install it on the 795/6.
If you've had a JSUM subscription previously for a 696, call Jeppesen and have them transfer your subscription from a 696 to a 795/6. When you open JSUM you will now see the subscription as a 795/6. Erase the previous SD card or start with a new one so there is no previous Jepp data on it.
Start the download process.
You should now have Jepp Chart on your 795/6. It works perfectly on the 796 right now.
Due to the bottom menus, the Chart is about 80% of the size of the Chart on the 696. Originally I thought that would be a problem, but with pinch zooming and finger panning that turns out to be not a problem.