Recently, I cancelled all my UA flights and booked them through F on VX and AA. I've always found paid F in VX to be the best value of any F class, except for when I need to fly into JFK, where the DL's T is more convenient for me. Aside from that, it certainly appeared the FAs will save at least a single space for a late arriving F pax. Also, VX's FAs are so professional, ebullient and actually appear to care about their work.

On my AA flight, I overhead the FA (this gentleman was one of the most professional FAs I've ever seen) assure a late arriving F pax that he'll find a space for his carry-on. If not, he'll require a Y pax to gate check his bag that's in the F bins. On the redeye transcon, he anticipated the F pax's every need. The moment I woke up from a nap, he immediately asked if I'd like a drink or snack. When I awoke in the morning, he appeared with fresh juice in glasses asking if I'd like one. This was clearly a true professional who cared immensely about his work.

So, no more UA for me, though it means having to traverse further from SFO's (having to bypass security again) and LAS's Centurion lounge.

I find VX's F class truly world class. Only two rows and F seats are never given away, but ALWAYS paid for in some way, shape or form. Now that they're starting service from SFO to Denver, I can ditch UA altogether, as have people in our Firm.