When people say one domestic's F product isn't as good as another carrier's, what exactly are we comparing? Leaving the lie-flat JFK-SFO/LAX options out of the mix, I'm not even sure that I can differentiate. US doesn't serve meals on a lot of flights but that's about it. Beyond that, UA has some in-seat power, but the seat itself on the 737-900 I sat in a month ago was hard as a rock compared to the US F seat. Honestly, of US, UA and DL F products (never flew AA F), I'd have a really hard time differentiating on things that actually matter. And to me what matters is having more personal space on the plane.