I'm happy about the HO version. I've been wanting a plastic HO U50 since the late 1970s! Seemed like a distant fantasy and now it's no longer vaporware. Even though I model the SCL, the U-50BB is just one of those locomotives I like because it's so unique and unusual.
I've read where some railfans/modelers refer to them as ugly. I've always viewed the U50s as tough, rugged looking brutes. Only thing that bugs me a tad is that they're not Genesis units, but are slated to carry a "Genesis price tag". But I'm still planning on purchasing one UP unit.
Since I'm modeling the late 1960s-early 70s era, a U-50 will "almost" fit in with my theme; although it will be a stretch. I'm modeling SCL in the Florida/Georgia region, which was a long way from UP rails, but nevertheless I can see an occasional "run through" from a U50. Back in the 70s, FRISCO SD45s sneaked in and out of Florida regularly.