I purchased a Willsenton amp from china hifi audio two years ago and had a great experience, shipping, packing, and answering follow up emails about the amp and its tubes.
However, recent attempts to access the website fail. Cannot establish a secure connection error message. Its been going on for a few months. Clearly something has happened to this dealer, who was the exclusive seller at one time.
You can buy Willsenton amps on Amazon now, and they honor returns, etc.