If you're ever feeling uncertain about the quality of a product, you can always act on that feeling:
Product in question, a 30V/5A switching supply, of the poorest quality China can supply (as I understand it).
Another warning sign (that came up in the IRC conversation that prompted the above message): if they don't state what
bandwidth the ripple measurement includes.
This particular prize pony sports a lean 200mV of ripple. No bandwidth or operating condition stated.
I can't imagine it'll last very long, either. The bargain-basement linear supplies are bad enough...
(Not a burned customer -- I know much better than to bother!
Just an FYI for "young players".)
Tim