Apparently few here have used it.

I looked it up and it says it is 5 feet wide, right? So if you are growing determinates it could start at ground level, if indeterminates then raise it up a foot off the ground like those who use cattle panels do so you end up with 5-6 feet in height over all.

How close? As close as possible. Netting is going to be so flexible that support would be flimsy unless the plants are practically on top of it. Once they develop some size and have the weight of fruit on them it will sag a great deal unless you really have some good tension on it.

Dave