With each update, people want to know how the update performs on specific devices. Hopefully this thread can give people an idea how 8.3 will perform on their device. When replying, please use this format. iPhone 6 8.3 OTA from 8.2 Performance Impressions: Easily the fastest version of iOS 8. 8.3 is extremely responsive. Feels faster than any version of iOS 8 or 7. App launching is noticeably faster, as is the keyboard. Stability: All of my apps work fine Battery Life: No abnormal battery drain. Noticing improved battery life. I'm currently at 5 hours 10 minutes usage w/ 33% remaining. I'm pretty hard on my battery, so this is very good battery life for my usage.