I spent a long time comparing this set to a Chinese-made competitor. The picture and software responsiveness were much better on this set.
Overall, I really like the picture quality and the 4K upscaling on this set. The colors and contrast are deep and rich on this set. I love the auto-dimming feature as it keeps the picture only as bright as it "needs" to be based on the ambient light in the
room. Motion is handled fairly well for a set in this price range, though it might benefit from a true 120Hz refresh instead of the made-up program they use to "simulate" 120Hz. I think the control of the TV is smooth and seemless when switching between apps. Apps load very quickly and there is no "glitchy" feeling to this TV like I found when testing out the competitor with built in Roku. I also think the finishing on this TV is very nice and it just "looks" great in the room.
Now for the negatives... My main complaint is that the Samsung app store is pretty lousy. You can't get a lot of popular apps like FXNow, Bravo, etc., which is frustrating for a supposedly "Smart TV" in 2019. This definitely needs improvement. With so many TVs using a third-party (Google, Roku, Fire, etc.), I don't understand why Samsung is hung up on trying to develop its own platform which drastically limits the content.
The other major complaint I have is with the horrible remote. I feel bad being so upset by something as stupid as a remote... but the remote and the app store definitely cost it a 5-star rating from me. Samsung wound the clock back 10 years and gave us a huge, cumbersome remote with WAY too many buttons on it (who needs a 10-digit keypad on a remote anymore?!?!?!) along with numerous tiny little buttons that really only serve to get in the way and accidentally get bumped while you are trying to navigate the remote. It's a Smart TV... take a cue from the OLD Samsung remotes and give us a directional wheel with a click button and just a couple of other necessary buttons to pop up the options on the screen.
Also, I like the idea of including certain shortcuts on a remote, but the problem is that including dedicated buttons for Hulu, Netflix, and Prime Video are USELESS to the people that do not subscribe to one or more of them. I use SlingTV... and its annoying to have dedicated buttons just for a couple selected apps.
Overall, it's a good TV... "for the money." A few improvements to the app store and the remote control and this could just be a "great TV!"