Flying in a few days and managed to get 11F/K on the ULR at T-96, but they claimed 11D was restricted (2 phone calls both gave the same answer). My questions:

1. How happy will we be in a couple in 11F/11K vs 11D/F?
2. Is one seat longer than the other? I'm 6'1 and partner is 5'5 so I'd prefer the longer seat (and my partner doesn't care from that perspective as long as we are both in the same cabin)
3. Is there a time 11D would open before airport checkin, like T-48?

Haven't seen responses that 11D specifically is restricted (vs the rest of the ULR bulkhead), but also not an expert in this area.