I have used Belkin routers for years, so didn't hesitate to get this handy Powerline unit.  Honestly, I have no idea how it uses the power lines to put the whole house on the Internet, but it does.  I have minimal problems with gaining access through the whole house, but this product eliminated all of them.  I couldn't be happier with how easy it was to set up and how quickly it solved my connections problems.  Definitely 5 stars.