Mastech power supply clones

[Sammus]

Howdy, I've made contact with a HK based company that sells similar power supplies to mastech (similar as in identical looking and model numbers). they will ship single units, and I can get an HY3020E for $225AU delivered ($500 for the real thing, if you manage to find it in stock) and $415 for the HY3050E (havent seen a real one here, $500 for another brand clone on ebay)

Has anyone had any experience with these clones? Should I expect it to be as good as a 'Mastech' brand one?