There are so many good subwoofer companies with proper dealer networks, support and distribution. I don't believe these small companies are worth the hassle, especially internationally. These little companies are just DIY subwoofer builders, that probably don't build anything nicer than the guys do in the DIY forum here. Their electronics fail too, and no one can get support when they do, I've seen numerous threads about this before.
If people are going to recommend these little internet direct brands that are so popular on here, I think it is safe to say you should at least warn against the possible downsides. This stuff happens too often with these companies.