In short ONN is manufactured by Element for Walmart with a license from Roku.
For comparison a 98" Samsung is $2,499.99 after $1,500 off.
Big take aways, slower/lower processor which you'll notice when trying to load up apps.
Also, it won't be compatible with a lot of apps. Certain apps will update out compatibility sooner than with other tvs.
Terrible sound, which most tvs have, but reviews says it is very tinny.
My biggest issues are;
it's only 60hz, with a tv that big that refresh rate will be more noticeable. 120hz would be ideal.
The HDR gets terrible reviews. The contrast isn't great, shallow blacks and not as vivid of colors.....
No game mode. I don't game on my TV often, but being able to at times.