[lxn]

The building I live in has this and it's not ideal. I consider it on par with other solutions, and I will not be my first choice for a new home due to complexity.

First it requires more hardware, it's more expensive and as far as I know you'll be stuck with one vendor. On top of that you need to isolate your home from outside signals (you don't want your switch to talk to you neighbor's devices). Second, it's pretty slow. This might be because our system is already 8 years old, but it's pretty noticeable (feels close to a second when you turn on the lights). And then you get into issues with your appliances that have cheap power supplies. I needed to buy a filter for my PC because the power supply unit was generating so much noise on the power line that the devices could not communicate anymore. Also I'm not sure how well this will work in older house, when the lines are not in best condition.

The system we have is made by DigitalStrom. They have a newer generation available, but since we rent I don't want to pay for the upgrade.