Personally I am very happy with mine. Slightly disappointed on the poor boost frequencies currently. But running an all core OC of 4.35GHz it's smashing everything I can throw at it. I don't really care that it's 5-10% a 9900k in gaming, I do believe the performance will get better in time and the 3900x is a more future proof chip, as games are likely to rely more and more on threads than frequency in the future (hopefully!). But in anything productive, the 3900x blows anything else out the water pretty easily.