APK size takes a small hit, and there's extra work to bring in Java libraries. That's all I've found. I've actually been using their guides when working on ordi

APK size takes a small hit, and there's extra work to bring in Java libraries. That's all I've found. I've actually been using their guides when working on ordinary Java-based Android code; their docs are well-written and their SDK maps nearly 1:1 to Google's (helps here that Java and C# are fairly similar to a degree).