As someone who spent $8K on Enhanced Autopilot 15 months ago, I'd say that pretty much everyone has better autonamous driving. My brother-in-law got a new Honda Accord a few months ago, and says on the highway he can just take his hands off the wheel and let it do it's thing.

My fancy-schmancy Tesla Models S meanwhile can do an ok job of following lanes as long as you keep your hands on the wheel and pay attention to ensure that whenever it doesn't detect your hands on the wheel that you give it a little tug.

I love my Model S, but they really bit off more than they can chew in the "writing our own software" department.