I LOVE the multi-language support without having to switch language! Custom words are handled nicely, including removal of wrongly added false positives.
Only gripe is stability; it keeps disappearing on a pretty regular basis (more or less daily) - killing and restarting the app at hand (mail, text, whatever) fixes it but that shouldnt have to be the case. Been like that from day 1 of my experience (a couple years back). Need to remove two stars just for that, unfortunately :(
Apfelmaennchen about Microsoft SwiftKey AI Keyboard