Ugh, IVOGO. IVOGO got the first Squape R clones to market, too. And that was $50+USD
thrown away by several thousand vapors. Their version was first available, logo and all. And it was bloody awful: shorts, horrible quality control and a permanent metallic flavor added to each and every
juice. Often totally unvapeable. I think the (Stattqualm) logo was the best executed part of the design.
I can only imagine how many things could go wrong with their rushed version of the K4.
I ordered an authentic K4, but I understand budgetary constraints and buying clones esp. when the
device in question is a good part of a month's rent/food budget. But if I were going to go for a K4 clone this time, I would wait a few months and see what develops. EHPro is the logical contender for best clone producer on this one considering their current 3.1 is quite decent and even incorporates useful design updates that users had been requesting from SM for quite a while. Also, since EHPro has been investing in their own R&D and releasing their own designs*, personally I feel less ethically conflicted about buying a clone or an "inspired by" design from them.
Just my 2¢.
*The Billow is a solid product for its price point that performs excellently with some trial-and-error and work on the part of the buyer. (which I think is fair for a $25-$30 product.) I haven't tried the Pontus or the Revel.