i found that h mart's quality has been degrading (i started going to h mart since 2007)...2009 was the worst, the ingredients (both japanese & korean booth) don't feel fresh enough...
i like their Oroshi and terimayo. (Trick for terimayo is to ask for less mayo and then add wasabi mayo later yourself so the dog won't be over mayo-ed )
Well, that was my experience for the hotdog cart. The yakiniku rice looks interesting.