This smart curtain track works great. It's quiet, easy to set up, and it works seamlessly with Alexa. This track system runs much more smoothly than my previous unit, a retrofit system with 2 motors riding on the rod. The old one had trouble dealing with the slightest bump, and those tiny motors running made an irritating sound. So, it's a welcome relief to watch this new Osprey system run almost silently. Plus, this system overlaps the curtains in the middle, so there's no annoying gap to let light through. Also, I like how easy it is to use Alexa to control the curtains - I almost never touch the remote.The rail system can be used as a direct replacement for a simple rod, but it does stand out a bit, especially the unfinished, shiny mounting plates. We used a basic cloth valence that's attached to the rail system, but a proper valence would look better. Ideally, the rails would be recessed into the ceiling for a truly built-in look.