I'm an Aliant Ultra high speed customer, and when I run the speed test at speakeasy.net, with no other bandwidth consuming program running, I usually get between 5600-6300kbps down, 500-520 up. Right in line with what they advertise, although it took one email and one day to get on the ultra speed profile. When my service was first activated, I was only getting at most 1500kbps. I emailed customer support, someone emailed me back within the hour and said they'd have a tech check it out within 24 hours and contact me when the problem was corrected. Next day, the tech phoned me and let me know the problem was corrected.