I haven't used either, but I'm in the same boat and researching both for my home. If you search around, you will find negative posts about both, and in nearly every case, it was a poor installer that caused the problem. Both systems are capable of what you want, but as Neurorad said, find a good installer, as that will be the difference between success and failure. Control 4 has a little more history than Elan g!, though the g! system was built-up from the Home Logic automation systems Elan acquired a few years ago, so you could make the argument both have been around for quite a while. Both have similar default interfaces and control equipment. Really, they appear (on the surface) to be quite similar. One edge I am giving Control 4 in my analysis is that they offer Composer Home Edition, which allows the homeowner to make a number of modifications to lighting, alerts, etc (you just cannot add devices without your dealer). I don't recall seeing anything on the g! side that is comparable.