After the success of the 6S, Rockwell went back to Kickstarter in October 2016 obviously bringing in this at a lower price point. They managed this by casting it out of zamak and moving the manufacturing process to China. It was also a success and the first batch went out in March / April 2017. It was generally well received and considered "slicker" than the "S" version.
Moving on about a year and the threads on the topcap started stripping, but Rockwell made good on the warranty claims keeping everyone happy.
They come in three different colors, Rose Gold, Chrome and Gumnmetal. It's a typical three piece but has an additional two base plates already in the package. The plates are numbered 1/3, 2/4 and 5/6.

The obviously share the same patent as the 6S and in the interests of keeping all the info on the page, the patent links are:
    (1) US2016075040A1 dated March, 17 2016
    (2) USD788367S dated May 30, 2017
    (3) US10807256B2 dated October 29, 2020.

How does it shave?
I used plate 5/6.
If memory serves me correctly, yes it is slicker than my 6S and effeciency is the same.