13 years ago I looked for amps that were small enough to place on a desk, and there were very few. There were lots of 5W Tripath units, expensive ones like the Parasound Z series (about $300), and some more expensive ones based around ICEPower 25W modules. This was kind of unique amongst the amps in that it was vertical, and promised better than average power (22W), two inputs, variable line out, and auto standby. It's too bad it doesn't meet the power spec, because if it did, it might be still be ok to buy. The FR bump is a bit unfortunate but pared with the typical small bookshelf, it might actually work out.
but for desktop use and as long as you stay below 10 W, I'd say this was acceptable 10 years ago.