[zserge]

Build times are used to be slower, but I think recent Kotlin compilers have "daemon" mode to speed things up.

I personally use Kotlin on a daily basis for Android development and build time is comparable to the one of Java. May I also recommend Anvil framework (https://github.com/zserge/anvil)? It brings declarative layouts and data bindings, which works best with the immutable data types of Kotlin (much like React does in the web).

[kcorbitt]

I also highly recommend Anvil. Anvil + Kotlin makes Android development feel sane and at times even joyous! I should write a blog about my experiences.