Just sharing an experience, maybe helpful for other newer Mi5 users like myself. Got my Mi5 in January this year so I had ROMs based on MIUI V8 from day one. Because I could not seem to get more than 3 axis OIS to work (tried the OIS calibrator too), I decided to give V7 a try. I am now on xiaomi.eu V220.127.116.11 and what a revelation! - Always-on fingerprint scanner works (not out-of-the box, but an easy hack) - Swiping to dismiss notifications in the bar works 100% of the time. On MIUI V8 I often had to try 3-4 times to get it to recognize a horizontal swipe. - Battery life seems much better (got only 1% drain overnight, never achieved that on V8 or LOS). - The OIS seems to work on all 4 axis (if I am to believe that test we've all probably seen on YouTube). So far I couldn't find anything from V8 that I miss enough to make me want to go back.