This is by far, one of the most thought out, well structured, clean and user friendly off-canvas menus I have come across.
It is light, clean, fast, responsive and if you have the time and patience to incorporate this into your theme/style, then I highly recommend it.
You will not be disappointment and I am amazed that @ibaker is sharing this with the community. Bravo and thank you.
If you are developing, he has left plenty of scope to play with.. I cannot thank him/you enough for this.