Yes, cxx.rs is really good for what it is! There's also autocxx that aims at generating cxx bridges directly. What Rust lacks is, to my knowledge, a C++ interoperability working group. cxx.rs (which is useable but by no means finished) could be a topic of such a working group. Direct compiler support of C++ could be another.

A better C++ rust interop story is a critical piece for Rust's success IMO