I have done quite a bit of business with Chinese manufacturers in recent years. Generally speaking they've had a rather bad reputation in the US. While there may have been some truth to it in the past, I've found it is no different than products made in the US (or anywhere); some really great, some average, and some extremely bad. Like anything made anywhere, it depends on the factory's standards. Most manufacturers (worldwide) make products to specific standards, depending on the target market and price point. And most offer various levels of product quality from the same plant to suit those different markets/prices. However in general Chinese manufacturers have a MUCH lower overhead than most countries and can produce some great products at exceptional prices. In fast most of the products labeled as "made in (fill in the blank)" are actually made in China. So there can be some real bargains to be had, but it depends (the same as anywhere else).
