How long have they been available in the U.S.?
I saw a site selling them in Feb/Mar 2006 , it was written in english and priced in US $$$ .
Afraid I did not take note of the company name as I did not know what they were and they were also very expensive $200+
I tried searching the net to see if I could find any reviews from buyers but nothing turned up except a lot of sites mostly written in chinese.