I have bought it here for 4 days at 429 euros, the 43-inch one. For its price, it is incredible. I am already the owner of a Samsung QLED 50-inch Q60 (2 years old), but I wanted something more affordable for the room. Comparing it to the Q60, I would say that it is much better. The colors are more intense and vibrant, there is zero bleeding light, and the viewing angles are much better. Comparing it to Netflix 4K, the plastics have better quality and it looks more premium compared to Samsung's plastic. Now, on the negative side, its menu is slow. It does everything, but with a delay compared to Samsung, especially when it comes to the internet. Also, it is twice as thick, which personally doesn't bother me, but it reminds you of previous generations of TVs. I am very satisfied with my purchase and I would highly recommend it, even to someone willing to spend more money, unless they go for OLED or NeoQLED technology. Only there will they see a difference in image compared to TCL.
Update: After some time, I realized why another user gave a bad review. The TV is made for 4K, so when you play it in low resolution like 360p, HD, or SD, it doesn't have the best decompression. You can see this on comparison websites. So, when you play a lower quality video, the screen is a bit blurry than it should be. But for 4K usage, it is very good. Not that the image is bad in HD, but in 360p and 420p, yes, it is bad. However, the usage in such resolutions is minimal