I have been using them for a year on trips of 500+ kilometers on a vstrom 650. Combined with a well-known brand's saddlebags, I have achieved a great economical combination. They have endured static and haven't even scratched. I consider it a very good purchase, especially because it provides protection. It doesn't move at all.
The negative aspect is that it doesn't come with instructions, but within half an hour, I had found the entire process and finished it.

They seem sturdy. There was a shortage of wheels and a major negative point is that there are no instructions (it's not difficult but they should be available even for the most inexperienced users)