I work in a clinic with prior owner placing Hiossen. Just inserted a UCLA ('Gold Cast') abutment - screw-retained, etc. It is actually in the US as Hiossen, but in the rest of the world, know more as Osstem and very large presence in Asia. It is definitely not as cheap as you think. I feel it is a decent company, they may not have an actual tech support like R & D department like Straumann or Nobel, but product line is not bad. I think they captured lots of ideas from other company, including Straumann. Example I see would be the 'reaming tool' to remove the lip after casting to a solid abutment, and having a "A" and "B" version of half-angle for the facial wall orientation of abutment parts - just like the Straumann, and I give them credit for that although not sure who first came up with that name.
Make sure you get their catalog to use the right type of hex driver and screws and check catalog number of parts shipped, just got burned because I did not reverify catalog number of part ordered and opened it. They may take a return but doubt it, I did tell rep in my email that was not the part number I supplied in my email order . . .
LCM