Don't know anything about their other products, but I have a Micronew 10-speed brake/shifter pair on my main road bike. I got tired of trying to coax the original Ultegra set to shift reliably and didn't feel like going through the elaborate degreasing procedure, which I've read doesn't always solve the shifting problems.

I prefer the Micronew shifting action to the Ultegra by a wide margin. Very positive-feeling shift, with a fairly loud click. The mechanism is very simple and robust-looking compared to the Ultegra no-user-serviceable-parts-inside construction, which would probably require the skills of a watchmaker to fix.

It's possible that some of their other components aren't as good as these shifters, but there's no reason to believe their Chinese origin means they're inherently inferior to Taiwan-made components. Many Taiwan-based companies have their components manufactured in China these days.