It works well. The resulting code often won't compile without manual changes on the Java side, but they're simple changes, and it does automate 90-95% of it. I'

It works well. The resulting code often won't compile without manual changes on the Java side, but they're simple changes, and it does automate 90-95% of it. I've never yet introduced bugs this way. It doesn't produce idiomatic Kotlin, of course. It's also a nice Rosetta stone while learning Kotlin.