Just updated my Xperia X (official) with this. jolla-camera autofocus now works reliably, and I can set ISO to 800. HUGELY improved.

Edit: However, lipstick seems to have had some regressions introduced. It now lags noticeably. I also have some increased battery drain over 2.1.3.7 with regard to bluetooth devices (specifically, rockpool with original Pebble Steel). I will investigate further and report back.