I used it during the beta and got the same results @outro posted about. It did lower the render times. I rendered the same scene twice, once normally and once with the program, and it went from about 1hr to 30ish minutes. At first glance it looked similar but it was noticeable in the light reflections on hair, skin and the metal on clothing. Skin and hair looked smoother with the program. I render in 4k, mostly portrait style, and I would definitely not use it for that as I'm looking for the most detail as possible.