I bought this about a month ago. I watched the reviews on Vizio M-656, M-657 and M-658. The Vizio M-658 seemed to have the best reviews and the picture quality has been great, so far. I really like the SmartCast feature, so I can cast my pictures and videos from my phone and iPad on the big screen.

I bought this smart HDTV to replace an older HDTV which died. Great intelligence - no longer need AppleTV to access streaming services Great visual experience - Bright colors and image is sunny roons Great value - terrific price with this great technology (N-1)

as soon as i turned it on for the first time it blinked on & off for about 10-15 seconds. at first, i thought it was doing this simply b/c it was the first time for it to be turned on however i was wrong. it did this pretty much every time i turned it on and it would also do it when i changed the channels. very frustrating as i had to return it approx 4-days later as i thought it would quit but again i was wrong. i bought this to replace a samsung that had recently got struck by lightning though after returning the defective vizio i essentially went back with another samsung.....

Brighter then most others, took me a little while to figure out how to keep it from turning on by itself. Build quality seems really good, have seen better blacks and whites but that was on TV's costing 3 or 4 times as much. I highly recommend used a line conditioning surge protector intermittent spikes of current can easily damage your TV.

Let's be straight. I am not a gaming enthusiast. I do not need the latest generation of screen technology. This product has excellent screen clarity and color. The sound is also excellent. It has current technology options like Air Play and Google Chromecast. My only criticism is that many of my devices can't find the Chrome Cast and I end up connecting them manually through HDMI. The problem doesn't seem to lie with the other devices as they have no problem connecting to the smaller screen, less expensive Vizio TV in another room.

I shopped specifically for this model because of the 600 nits of brightness and the 90 dimming zones. The picture is amazing, and it costs a lot less than similar TVs, especially OLED. While this is not OLED, it comes the closest to any I've seen, and at a huge savings. The free apps are good, and it has a ton of them. It also lets us use Airplay to sling any device's screen right up to the TV -iPhone, iPad, computer, etc. This unit doesn't have a camera or microphone, which I view as a huge plus for maintaining our privacy and security, as well.

I decided it was time for an upgrade. I purchased a Vizio 1080p 60" in 2012. Great tv, that's now in my bedroom. I just wanted more. The Quantum Series vs the regular M-Series is really a no brainier. The price difference is your picture difference. If you spend a lot of time with your television, sports, movies, games, family time, etc. Drop the extra dough on the Quantum. The color difference is unbelievable!! I would've went Quantum P series, but that was a little to steep for me. The only thing I've found that I don't care for is the input menu. There are multiple options when I really only use 3-4. I suppose it's a learning curve as well. I would highly recommend this tv to all of those on the fence about it.

[This review was collected as part of a promotion.] I love the quality of the tv and all of its features. There are 2 slight issues with it though. It will randomly turn off (no sleep timer set, it just turns off randomly a couple times every hour). It also tends to say it's not connected to the internet even though it says it is in the settings

I've had this television for two week and as of right now I have found very little to complain about. The picture quality is superb, the 4K makes live sports look stunning. It comes with built in app and your not able to download any additional apps but one can over look that because the tv comes with both Apple air play and chrome cast. The one flaw I do see is with the sound, I have a hard trying to balance out the sound effects and the actors talking. I find myself having to turn down the volume on some action scenes. This problem might be corrected with a quality soundbar. Overall one can not go wrong with this tv.

So far it has been a very good tv. has very good blacks in the picture, I wish I could say that for the whites in the picture it seem to have too much red tints in the white. I have tried to turn down the red but makes the rest of the picture look bad. it does have different settings for preset colors most are good. I hope that some day that there will be a update for the colors setting. very good QLCD tv for the price.