This is such a clever product.   I live in an apartment with half bay windows.  They do not like curtain rods attached to the ceiling so these are nearly perfect.  

They are a bit tricky to install.   Picture instructions are difficult to interpret and could benefit from a few words.   If you are a bit weak it is hard to tighten them.   It is a two person job.

For my needs, it would be better if they could be just a bit narrower, say 30".