One of the things that I really liked about the goose gear design is the hinge will allow cargo slide outs to slide out even with the shelf down. I think there are a couple other brands that have an obstructed systems, but the ones with cables or bars that fold out to hold the shelf will not...
I have the goose gear table and could not be happier with the quality and function. I looked hard at everything and I know this one is a little more expensive but it's worth it.
One more recent addition. MC baller joints. My joints had 15,000 miles on them and are still fine but a friend was having a ball joint party and I decided to proactively replace mine.
I use cartridges for the air jack and the tank for the tires. In truth, I have not needed to use the jack yet. I have the stabilizing base for the jack for soft soil/sand.