Hi guys, new owner here. I looked for a Haynes manual, but the only option was a digital version, which I assume also include a cheapo OBD11 dongle (?)
Are they any good? Can I make changes via the OBD11?

The Haynes digital manual is complete rubbish, I bought it when I first got my Yeti but immediately complained about the lack of any worthwhile or useful content and got a refund.

The allowed me to retain access to it after the refund but although it has been built on it's still worthless IMO, you'll find far more info in places like this and Youtube.

I don't think it comes with an OBD11, where have you got that idea from?

Yes, there are lot's of things you can do and change with one and, unlike the Haynes manual, well worth purchasing.