Like I said, I've had one for about a year. You can out-run it with a DA sander or die grinder, but for anything else, it's more than sufficient.
A large IR or Quincy is quieter because they spin the pump slower (this one's not 2-stage).. . but it's ten times quieter than an oil-less. Mine's on the other side of the wall from the sofa in our living room. You can TELL that it's running from inside, but there's no need to turn up the TV.