Not many vendors give arrival dates anymore as it is out of there control. I have seen on 1 site though that they expect to ship by the end of this month.
The reviews on the Predator have been really good. The only one that really got my attention was Daniel from DJLSB vapes who has always been critical of Wismec, mainly there poor 510. He said that now it is one of the better 510 connections and the testing showed it was pretty accurate for power delivery.