hisense is at least top 5 brand in china. TV i believe is one of their strong product.
they sponsor euro 2016, F1 (from what i heard not anyone can simply get to sponsor these big games even u have the financial power).
they're throwing a lot of money in marketing and building up market share in msia. thus their price is very competitive. i have not heard of bad quality on their TV so far, and it comes with manufacturer's warranty anyway. samsung is a global brand, their phone also got problem.
i won't hesitate to consider hisense TV if i need one in future.
my 2 cents

low quality in terms of what?

the display? the material used? 

PQ depends also on Source material, not just the TV.

Ooh PQ means Pict quality.. Real noobie

The source is same for others units? I mean same video clip for few TV units..

Myself and my bro in-law uses Hisense with no issues so far except for the painfully slow startup of the Smart TV models..because it has android loading together..I would prefer the non-smart tv version and buy a separate android/apple tv/Roku/Fire TV..and have the option to upgrade when it's outdated instead of having to change the TV (for smart tv model) 

thx for the info.. now my choice between Hisense 58"(RM2k) Sharp  58"(RM 2.2k) or 4K 50" any brand (RM 2-2.5K)...

- 8" inch bigger in size with FULLHD
- 4K stunning display with smaller size by 8" inch 
which you guys recommend ?