Failure or success with Jeg's or Summit branded ( china ) parts

I've used alot of their in house stuff. I've used Summit mufflers, Jegs exhaust kit for my barracuda, currently have a Jegs electric pump on my race car. I've used both of their AN hoses and fittings and feed lines. I'm sure I've used more than that, but that's all I can think of at the moment. I never had an issue with any of it.