A little pricey for what you get, but they work. 

Installation is easy if you can handle a drill and tape measure. One of the two of these I had ordered came cross-threaded (post would only screw into base two turns out of the 12 or so required). I oiled it, then used the screwing in motion of putting the cover piece on to reef it into its spot. Shouldn't have been so difficult, especially at this price. However, in the end it's installed and our curtains are held back, so it's doing its job.