for the most part I don;t book MR on the phone, I've found that using Orbitz/Expedia I "usually" can easily replicate most US runs that I find on ITA. (SJU-PHL-PHX-LAS-SFO-LAX) Did a lot of them when I used to get 300% credit to bmi for those cheap-o A fares...

.bomb for UA sucks, but sometimes you can replicate it on Orbitz

but if you have to talk with an agent, just say it's an MR, 95% of them get it, the 5% that don't... ehh, not worth explaining it to them...