Due to an injury, I was not even able to take it out of its´ carton box, yet, so this short review is actually about the 5,7 of the same type and model year (2021 Speed):
it is a beatifully crafted sail, almost free of wrinkles. Cam rotation is perfect, and when it is powered up, it behaves as one can expect it from a sail like that: It´s well balanced, feels indeed light with only very little backhand, even in the strongest gusts. A big surprise is its´ capability to glide through lulls, really remarkable.
In all, a sail to have fun with, and always capable to challenge those with the “big brands” sails.
I use it with RDM cambers on a NP TPX 100.