There have been reports, that are fairly well substantiated, that in the past Jebao products have leeched heavy metals into tanks because of poor build quality leading to exposure of interior parts. When you buy one you know you are getting a cheaper mass-produced knock-off and run some risk of issues from poor quality. Most people don't have issues like this, but it is something to consider. I have always felt that with the amount of money most of us spend on livestock that some corners aren't worth cutting.
Add to this that Jebao products are built and based on stolen designs from American and European countries, and then built in China and, at least for me, there is a component of ethical issues.