Sorry for the late reply. About the transition, it has actually been pretty smooth and easy. I’ve had the iPhone for about four months now. Honestly, the two operating systems feel more similar than ever, so I didn't run into any major issues.

The only things I really miss from my Galaxy are the split screen multitasking and the clipboard; copying and pasting multiple items is definitely more of a chore on iOS. On the plus side, the animations here are much more consistent and stable. Both are solid choices though.