Same here, I thought it would have been ready for that long ago as they touted embeddability as a prominent goal, but every few months I try again, and have to give up again.

So far I’m using WebKit while I wait for libservo to be ready.

The article however is a very good explanation (as far as I can tell) of how the SpiderMonkey Javascript interpreter is linked to Servo. What I need in the first place is the layout and rendering engine, but hopefully this article will be useful for me in the future.