Got really good flavour from mine for about two weeks, then a disgusting burnt plastic taste ! Looked inside the barrel and unbelievably Aspire have just used a generic PLASTIC air flow insert. Mine had just bubbled and melted. Expected better from Aspire. My build was only round wire coils @ 0.75 ohms. Would suggest keep your coils as tight as poss to velocity posts, higher ohm, low wattage.Aspire quad flex rda from Ali bongo express. £3.45 delivered.