alt Hacker NewsIDK, when I tried one DKC was completely unplayable. For some games it's very important. This has been a well documented problem with the cheap scalers.
They have other issues too and RetroRGB has a good video going over the problems:
https://www.youtube.com/watch?v=ZUrqWN4AcJc
Not all TVs support 240p over component either, especially from the late 2000s/early 2010s which means you can run into problems with some PS1 games on a PS2 or earlier consoles.
https://www.hdretrovision.com/240p
These days there are clones of the RetroTink 2s and options like the ODV GBS-C that are decently priced and good options.
I am aware of all this. This is why I said that depending on the box it can be either total garbage or "ok". At this point any emulation is always going to be easier.