The device itself is fine.
However I researched the device before I purchased it to ensure it supported CEC.
It turns out that it will turn on a connected Monitor, but it DOESN'T accept incoming CEC controls.
(Or at least not from a Denon AVR-X4400H amp, like the previous Samsung Blu-ray player did)
My aim was to replace the Samsung Standard Blu-Ray with a 4K version, which I have done. But in the process I have lost all remote control via the Denon app or handheld remote.
So I'm back to a shelf full of remotes again.
For the price, it is perfectly acceptable, I'm just disappointed that the advertising suggested it did support CEC.