TCL TV's are good but quality wise not as good as the ones that are sold in US. They have one of the worst service even in warranty/guarantee period. The problem is these TV's are not serviceable (not only TCL but many other front-line TV's like Sony, Samsung, LG...etc). As for other frontline TV's usually the service is quick as they change the board/panel or the TV itself if it is not serviceable. As for TCL if the TV does not work they will simply say they do not have the parts and will procure them as and when they are available . I was unfortunate to buy it and had a harrowing time replacing the faulty panel. It took them 3 months and advocate notice from my side to have things moving to get the panel replaced. This is my experience but probably it might be different for others.
No doubt the TV is very good but please protect your TV with a good stabilizer.
Wish I could add anything positive, but I'm stuck in a similar situation. Their OTA software update bricked the TV, which remained stuck on updating software screen overnight, and it's been out since more than a month. Customer service clueless of course.