This is very exciting. Here is the APK I downloaded. And the associated discussion.
It even already seems to support stylus input which is very exciting seeing as there has been talk of porting RNote to Android.
I think the saving grace is that you never actually see the C (it's piped straight in to GCC), so it might as well not exist. C GObject code has a lot of boilerplate and I like to think that Vala is the programming language that GTK programmers are actually thinking in when they write their C. Vala is essentially a compression of the C code with less room for errors.