I concur 100 percent comscanaus. What is scary is some of these radios are being used in commercial service. The quality of Chinese lithium ion batteries is suspect, not to mention the charging circuitry. You get what you pay for.
Let's see how good the knock off is when it sets your home or business on fire or burns a hole in your pants when it's cheap lithium battery becomes an personal explosive device.
Nothing is really known about who makes the radios, the quality control used, source of parts, safety certifications, nothing. The US distributor of one of these doesn't even list his phone number citing his "sharing a phone line" and "doesn't want his phone ringing all hours of the day or night". Yeah, nothing hokey about that.
But these impostor products give the legit manufacturers a bad name. I have yet to hear a reply from Yaesu/Vertex USA.