I am assessing the RDNA 40 as the prices have come down from what they were - in the UK it is being offered by some vendors for just under £100 whereas 4 months ago it was over £150. However the joyetech Evic VTC Mini is also very appealing. Do people here feel that the Vaporshark is a superior device and worth the extra coins please as even though the price has reduced they are still about twice as much as the Chinese machines ?