Sunywayman on the other hand, is specifically targeted for the US market with their products, ...
I guess you're overestimating the US market. It buys on these criteria:
- price
- is it widely advertised / recognized brandname
- price
- was it featured on Oprah
- price
- is it regarded as being "cool" by your peers
- price
- is it widely available, including at the closest supermart and corner gas station
- price
I can't see how SWM answers to these. Note that some of their models are available in Europe and Asia for some time now but no show in North America.
Look at the chargers market too. Lots of good ones for Asia/Europe, while N.A. is a place to dump the junk models.
Nap.