IVB said:works awesome, I love it. Integration with the Echo is key, I rarely use a device to manually turn on/off phones, just voice.
I have an Elk, but use the VRCOP with CQC. I'd imagine it would work fine with the Omni, since replication from ST to VRCOP is easy. There's a SmartApp called Pollster to ensure the ST knows about manual or other changes. CQC knows about lights getting turned on/off.
Get one. Its only $100, works great for several of us. Then go buy an Echo. Or two. I'm contemplating getting a 3rd...
How about using something like Siri with an Apple Phone or watch, so you don't have to be near the Echo for voice control?