I HAD A GT-190.
And I hated it. It was the worst (at the time) $500 I ever spent.
It was missing a few pixels in the screen, so there were a couple black dots, and the worst was that it was very.... blue tinted. And you are extremely limited on color correction because it was meant to be a MONITOR, not exactly an artist tablet, so you could only adjust it like you would a television. It also despises Windows 8.1 and up, and will constantly lose its pen pressure. You will always have to shut it down and restart it when it does this, REGARDLESS of the drivers they tell you to install to "fix" it. They don't work well, because it was meant for Windows 7 and lower. When it gets hot and tired (an hour, that's it,) it will slow down and lag. It's also just in general really heavy and bulky.
It's very old and out of date now anyway. By the time Huion came out with its newer models, they probably upped their game n fixed the issues they had with the GT-190, but I seriously don't recommend it.
I went and bought a Bamboo Splash, screenless tablet and stuck to it ever since. The thing is collecting dust at my old house right now, I never touched it for 3 years after I bought it.
I tried. I really did. I WANTED to like it, because I'd always wanted a screen tablet. Look into Yiyinova or Monoprice instead... I can't speak for newer Huion tablets, because I refuse to buy from them again at the risk of wasting my money a second time.