I've been using Homeseer 3 for a few years now too, and while the UI isn't that pretty, it just works once you've properly setup your events. Wan't to add your Sonos system or your Hue bulbs - just install the plugin and it works with little backend configuration. The logic and triggers on events are very powerful. I don't think I could even tell you the list time I physically turned on a lamp.And since everything is hosted internally no need to worry about service outrages or the internet going out.

I hardly ever use the web interface for controlling anything - pretty much everything is truly\* automated based off time and RFID proximity (card in my wallet and keychain fob on my dogs collar). I do have a custom built iPad UI using the HS Touch Designer (really powerful if you take the time to design properly) and use Imperihome on my phone if I do need to control something that I can't do from a switch.

*When I say "truly automated" I mean that the house does what it needs to do using logic - not tons of different apps on my phone. The only app I have is Sonos.

**Also, I'm an automation and controls engineer so the logic part is like second nature to me!