If you do a search, the topic was well-discussed previously.
The general concensus was that they were well worth the money, especially if ordered with the camper, as they are quite inexpensive then.
The only negative anyone could come up with was that they tended to flap a bit in the wind if you are camped in a windy and exposed area. We have never experienced that yet.
There are too many positives to list them all!