I think they are quality but not anywhere near VF or the xpv ... My rdna 30 broke a month into owning one... Definitely better than any clone, Hana or sigelei... But it's pretty prone to breaking... The 510 is good and the wiring is done well but the case design and paint on the mod isn't great.. And the board is prone to shorting when a little juice gets inside which is very possible ... juice can seep inside the buttons, USB port, the edges of the panels... It took one accident and my daughter board was fried
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Many months now I don't have a single issue with my VS-DNA. It's a rock solid workhorse of mine. And where else can I get a DNA device sleeker/tinier than the VaporShark