Yes i hear vertex do make a good product, even though they are Taiwanese i believe. If you have a look at Stefan Gotteswinters channel on youtube, he pulls one of their rotary tables to bits and tests it, and improves its slightly, but i think he said it was not a bad product to start with.
This old tony did something similar with a vertex milling vice and again he found it was not bad, especially for the money.
With a non-name product, you really are asking for trouble, and while some of the old western made tools are great quality, most are worn by now unless you are really lucky to find one that has not been used much.