well, he's got yellow legs (good) overall shape appears ok (tho he seems to be missing tail feathers, so tail shape can't be critiqued). his comb does appear to be dished somewhat, maybe a bit coarse, but overall i think he's nice. now whether the columbian pattern is correct is hard to tell in any of the pics, since they're all a bit fuzzy and washed out some.
I'm not that familiar with proper columbian color patterning, since i tend to avoid any birds that have a lot of white on the belly, since our dirt/mud turns them a nice beige-orange. the backs stay clean, but not the lower halves. LOL