It seems to be a compelling little solution for most people's needs, and definitely a more compelling option for deep bass than, say, the 3000 Micro or similar compact subs, but I'd be interested to know how the relatively high distortion (within CEA-2010 limits) affects output or perceived quality of sound in-room.
In my personal experience, after having to move around my seating arrangement and have it against a wall as compared to previously into the room, if you have higher distortion output anechoically, you will end up with much more muddy bass near to boundaries than with your seating into the room, as the high-pressure zone near a wall also amplifies distortion harmonics to an adverse degree. And this, in my testing, is both measureable and audible, ie. with seating close to the wall distortion rises much earlier and is much more audible and prominent than with my seating away from boundaries.
In a well-designed listening space, this is not much of an issue, but I think this is an aspect to keep in mind when looking at subs and designing systems. We all always want the cleanest output, of course, but seating position and room acoustics can really highlight issues even within testing standards' limits.
