When you buy a big TV, make sure the credit card you use gives a warranty extension. My Mastercard adds two years to the factory warranty on items like this. Last year I had a Vizio TV fail when it was one month outside of warranty. I sent a picture of the screen to Vizio and they have an analyst who can determine what is wrong with the TV just from looking at screen pics. They sent me an email confirming that the issue was "not economically repairable". I forwarded that along with the original sales receipt over to my credit card and they refunded the full purchase price of the TV back to my card.
Also, when a TV or something big fails, don't forget to check to see if there is an extension. I would not have known about this if the people at Vizio had not suggested that I check.
Overall, I do like Vizio. My current 70 inch 4K Vizio looks awesome and costs less than $1000. For the most part Vizio seems to be a great combination of price, picture quality and reliability.