Anyone have any experience with them? I'm about to move, and thinking I might buy a set to try out. I've heard they can be hit or miss, depending on quality/age of the wiring in the home. But when the work, I've heard they work well. Was thinking about getting the WD Livewire Powerline, as they have good reviews. But I've seen other models rated for 500MB, but most of the lack the number of ports that the WD offers.