I would recommend anyone still unsure about this to purchase one-time access (or be guested into the lounge, which many of us already offer for fellow frequent flyers) around 7:00am or 4:00pm. Assuming you're able to find a seat, look around and ask yourself if there really is space for additional domestic F passengers. I'm more worried about UA adopting a DL-style restriction on early admissions. Adding domestic F passengers might force them into such a decision.