Kotlin language. Has anyone used it, in what IDE, and what do you think of Kotlin as a language; pro's & con's?

Question

Kotlin language

Answer 1

I've read enough of the language specifications to know I'm going to learn it. I'm thinking it has the potential to become my favorite language.

Answer 2

I'm in the process of learning Kotlin, and am using it in Android studio.

Answer 3

I'm making a temporary pop-up, which informs user via a message that appears on the screen app at this moment. It's just practice at present time.