I have a 2 door. I put the back seats in and carry 2 passengers in the back. All 4 of us have day packs.
I found a net to put in the back. When I open the tailgate, I do not want the day packs to fall out.
Problem 1: There is nowhere up high to tie the net. I used bungy cord around the sports bars up high but its not a great solution as there is no tie down point there.
Problem 2: The tie downs on the floor are quite some distance from the sides. It would be better if they were nearer the sides.
If a net were made to fit in the back of the 2 door with clever tie down ideas I would get one!
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"Where the warranty is: just buy another one if/when the first one breaks because you can afford it."
Seriously: mission critical parts of your rig: go with time tested brands: cargo net, consider saving money, (unless it's holding mission critical parts of your rig.)
I have a 2 door. I installed a net to be used as a shelf. It is designed as quick release. Also I can move it back and forth as I see fit. See photo.
You asked about a ceiling net. The top of the photo shows a ceiling net. This is a bungy material with a stick for stiffening. When I put something there it stretches and obscures my rear view. I need a net like the shelf which does not stretch.
I have been looking at Raingler nets. They are expensive but they can be ordered to almost any size.
They seem pricey so I have not ordered yet....................................
My thinking was to store jackets, jumpers, woolies, gloves, rain jacket, etc to keep them above the main cargo. A sleeping bag would block the rear view. I'll post here as things develop.