Is there a consensus on how to value RDMs used to upgrade to domestic F? I'm 2p, so no SWUs, but no copay either. I only ever use RDMs for 15,000 mile upgrades on flights over 2000 miles -- E.g. IAD-LAX,SFO,LAS, or SEA. FWIW I'm tall (6'3") and value the extra recline for my back, but wonder if I'm squandering a "better" use for my miles.