I flew UA for years (as a kettle before my FT days) out of SFO and was always impressed by the sheer nastiness of many the GAs and cabin crew. (Now this may just have been SFO -- my uncle who is GS with them still goes out of his way to avoid that station). The final straw for me was being forced to deal with flight delays at something called a "self-service customer service" kiosk in ORD circa 2004. CO has always been head and shoulders above those experiences. That said, I wouldn't be surprised if end up flying mostly UA metal after E+ reciprocity. Still, I'm not at all thrilled by the prospect.

Nice to hear about the exit rows on US. Good to know in a pinch.