Hmmm. I'd like some of them to be tested by Jim tbh, in his torture chamber.
There are 2 or 3 for sale @ ebuyer. None of them are from what we may regard as a "quality" manufacturer.
However, I got 2 suspects that were supplied with a range of htpc case, quoting 400w, and they ~seem~ to be ok. Not as if they're going to be pushed to any degree.
I do hear stories of "quality" manufacturers making some, but never see them.