I replaced a Vizio M512 K6 Elevate with the X50. The Vizio was a 5.1.2 and I was looking for a "reasonable" 5.1.4. I ordered the X50 with some reservations because I've never heard of Ultmea and it was a refurbished unit. I'm not sure I could tell the unit was not brand new, aside from the packaging. After some fine tuning to my personal taste, using the outstanding phone app, I am completely satisfied with my purchase.