My S. has gradually replaced all her back fencing with those plastic panels. Basically, you need to put in 6' concrete posts which have slots down the side, correctly space them apart, and then you just slide the plastic panels down into the slots - they're horizontal panels, so 5 or 6 do the job between each pair of posts. They are maintenance-free, I believe, quite attractive, and I'd give them consideration over wooden ones. Price-wise, I think they were quite competitive.
The old rickety fence between us and the neighbours survived the storm thankfully, although it was giving a pretty good impression of an accordion when the winds were at their height ....
