Well, I highly recommend these for odd-shaped windows like bay windows. They were affordable, easy to install, and look nice.
In this last image you can see on the far left a larger rod along the wire curtain. This rod is used to adjust the tension. Having had these curtains up for a few months now, there is a natural tendency for the curtains to sag a bit over time. That, and the fact that the kids sometimes play behind the curtains, pulling on them. I found that simply adjusting the tension using this rod quickly fixed the sagging issue.
I’m happy with this product.