I can't speak to the particular model you mentioned, but if it's at all like their iPower, which has the appearance of an ordinary wall wart, looks are deceiving! To my ears, my iPower sounds quieter than my more expensive TeraDak DC-30W LPS, despite its being a SMPS. Unfortunately it doesn't provide as much current, so if you are thinking of getting one, make sure it is sufficient for whatever device you plan to use with it.
There is a guy over at Computer Audiophile who posted measurements of the iPower along with several other power supplies, both SMPS and LPS, and a 9V battery. In his ripple test, the iPower beat everything but the battery. I'll post a link if the mod will let me (I'm guessing it's against forum rules.)