What We Didn’t LikeThe TCL 6-Series 4K TVs are superb, but they’re not perfect. And while they literally outshine other pricier 4K UHD TVs and almost any similarly priced TV edition, they do have a couple of notable flaws. The first of these might even be a sale-breaker for some users.Motion handling issuesThe first and most major problem we definitely need to mention about the TCL 6-Series 2019 editions is that their motion handling isn’t excellent. It’s very good, and usually superb for gaming but these TVs max out at only 60Hz of native refresh on their display panel and that makes them useless for gamers who want to do high-frame rate gaming at 1080p or 1440p resolutions. Secondly, because they lack advanced motion handling features like FreeSync, tear-free gaming might be difficult to avoid. On a final note, the backlight isn’t flicker-free and this sometimes creates motion artifacts and brief visual duplications that are visible from time to time.Weak viewing anglesA second issue of the TCL 6-Series 4K UHD TV is its weak viewing angles. This is caused by the native vertical alignment pixel design of these TVs and since a majority of all LCD 4K TVs come with the same technology, it’s not a problem that’s unique to the R625. Avoiding VA display is tricky and IPS, the other main LCD TV display technology also has its own problems with contrast as a counterpoint. The bottom line: the R625’s screen quickly lose contrast, color and brightness quality at angles of more than 20 degrees to either side.