Samsung 50" 4K Smart TV

I feel remiss in giving such a low score. Most of the time, the image on this TV is perfect. Crisp. Clear. EXCELLENT upscaling of non-4K content. Excellent pixel refresh rate. Good sound. However, the basic purpose of a TV is to present images that match the intent of the director of the program you're watching, with some adjustments you make of your own preference. This TV does not do this most basic function because you cannot disable the auto-dimming during dark scenes. To provide some context: There is a feature on most TVs that adjusts the luminance based on the brightness of the scene. For example, if characters are in a dim room and someone walks in front of a light bulb, the TV will become EVEN DARKER, as if you physically reduced the brightness of the pixels. This feature is intended to save power. I believe it is called "Motion Lighting" on this TV. You can certainly turn Motion Lighting off, but what I found is that it just lowers the threshold for how dark a scene needs to get before the TV makes itself EVEN DARKER. You can try different image settings (Dynamic, Natural, Standard, and Movie) and get the illusion that you solved the problem, but this only changes the threshold for how dark a scene needs to get before the TV makes itself even more dim. I called Samsung customer support, and they treated me like an idiot who didn't understand what I was looking at. I asked a technician to come to my home and inspect the TV. The technician agreed that this was a problem, and replaced several parts of my TV. Upon installing the new parts, the problem remained exactly the same. The technician suggested that I call customer support, at which point I completely lost confidence in Samsung's competence. The entire reason someone needs to got to your home to fix your TV is because the phone support was not able to solve the problem. If someone needs to come to your home at all, I expect the person to have a PhD in fixing this TV. To summarize what came next, for days I asked to speak to phone support, then to that person's supervisor, then to that person's supervisor, etc. I finally reached someone who knew what he was talking about. This person told me what I already know: you can certainly disable motion lighting, which changes the threshold at which the TV will dim itself. You can certainly change the image setting, which (again) have different thresholds for how dark it needs to be before it dims itself. But you can't shut it off. He explained it to me as if this feature was doing me a favor. If I don't like a feature, I don't mind it one bit if I can turn it off. Making this feature mandatory is a mistake. When the TV dims itself automatically during a dark scene (or during ANY scene, really), it is not representing what the director wanted you to see. That's the big problem. Associated with that, I find it quite distracting when I'm watching something, and the image actually becomes more difficult to see. Someone else might LOVE saving some energy and tolerate this feature, and more power to them, but I want the choice to turn it off. And so, I believe this TV fails the most basic function that a TV is supposed to perform: to give you images that represent what the director of this TV show or movie wanted you to see, plus some of your own adjustments (color, contrast, brightness, etc) of your choosing. I returned the TV. Doing this broke my heart because (when you're watching something bright, anyway) the image is AMAZING. But it doesn't perform the basic function of a TV.