The TCL QM6K is a well-rounded TV, even if it doesn't excel in any particular area. Its strongest suit is its very good gaming performance, helped by its very low input lag, high refresh rate support, and numerous gaming features. Visually, the TV doesn't impress, although its black levels are quite good due to its impressive contrast and good black uniformity. Unfortunately, there's more blooming around bright highlights than you'd like, but it's alright. Its HDR brightness is mediocre at best, so the TV doesn't provide an impactful HDR experience overall. Still, it's a decent choice for reference conditions due to those black levels, good HDR brightness accuracy, and low amount of stutter. It performs better in SDR content due to its high SDR peak brightness, which is enough to overcome some glare from brighter rooms, just as long as you avoid placing any lights directly facing the TV.