They're a very simple, streamlined design and actually intended for outdoor use.
Indoor or out, they're definitely a step up from what I had:
The old-fashioned tension rod with a sag in the middle.
The person who installed them had to customize the allen wrench and saw down part of the middle curtain rod. I wouldn't have been that ingenious so I'm glad I didn't try to put these up. It would have ended in tears and with permanently sagging drapes.
So congratulations Huron. You avoided a meltdown and got to get rid of your granny panties. Huzzah.