I received an Instant Pot for Christmas - haven't tried it yet - but I have also made bone broth in a regular pressure cooker using this info as a guide:

http://nomnompaleo.com/post/1600411...oker-bone-broth

I found it a LOT more convenient than simmering for hours and hours. I even made two batches out of the same ingredients, with the second batch being less strong than the first, but still useful.