Needed to take Shark Jr from SEA to PHX via SFO at the back end of the monolithic RTW itin involving RGN. Visits to St. Helens, the lava tubes and the Monterey Bay Aquarium were called for. MsShark had to return to the salt mines to pay for Shark Jr's fun.... I was contemplating purchasing these tix, but the costs were very high and the RDMs earned would be minimal on these short sectors. We were able to use DL SM the week prior to book a circle trip at 37.5k each in Y. It's not that we couldn't use UA MP to concoct similar itins - more of them, in fact, at less than the same total cost (12.5k each from SEA to SFO, but 10k each from SFO to PHX because that's a domestic one-way of less than 700 flown miles and qualifies for UA's most economical award). However, the option value of the UA MP miles for international travel is so hugely greater, that it was worth burning 37.5k SM each on this itin to avoid using 35k MP miles each. This plan saved quite a few $$$ over paid tix, we received one free checked bag each, and our BPs stated NO FF CREDIT. We also managed to move into EC at T-24 as some lucky Medallions received UG from their usual chairs. So on this occasion, DL actually delivered the stated Medallion benefits - something it often fails to do for more costly int'l itins especially involving partner airlines. If this was all I ever needed/wanted from an FFP, I suppose SM might be more tolerable, although even in this case, there were numerous out-of-range SM costings for same-day itins ranging from 52.5k to 100k each for Y in classic Jeff bandit style. The actual paid TPAC DL BE sectors will credit to AS, so that we can actually use them - for J on EK! A better option than anything DL SM can offer. The DL agent at NRT asked me why do this, when I had Medallion status. I responded by stating politely that SM were almost worthless for international itins and that the frustation levels were so much lower with UA MP.