They are poor by comparison to the same model flat screen (if available), the viewing angles are far worse on the curved screen, you need to be head on or at most 15 degrees off centre, and the picture quality even in UHD isn't as good as same spec flat screen. Most test reviewers still ask why the companies stick with the curved screen, but most companies are now giving option of either or just flat except Samsung. Price and size (50" +) of course can make a difference, but the same above still applies.
"My lovely car now sold onto a very happy new owner.
I still love this marque and I will still be around, preferred selling to breaking, as a great runner and performer"