My memory of this place from many years ago - the little hole-in-the-wall at Valmont and 28th, next to Agave and Jimmy & Drew's Deli - was of dank, scary place with unfriendly owners and expired bottles leaking on the shelves. I revisited it recently and...
WOW. They've really cleaned the place up, stocked it well, and gotten much friendlier. The Kim Chi they sell is the best I've had in the area (Houston Calco brand). Their house-pickled vegetables (mustard root and carrot/daikon) taste fresh and are excellent for making dan dan noodles or banh mi. They sell many varieties of dried and frozen noodles, including several types of the thick, chewy udons that might be my favorite in the universe. And they even had frozen banana leaves (which I bought to make cochinita pibil in my slow cooker, hardly an Asian specialty).
If you haven't been in a while, it's definitely worth a visit. They don't have the selection of Pacific Ocean Seafood Market, but if you live in Boulder and want to shop in town, it's a great option.
(Sadly, I can't say the same about Jimmy & Drew's Deli next door. Their descent from authentic Jewish deli continues; today I stopped in to grab a potato knish, and they're no longer selling them - in fact, the entire deli case with Jewish deli standards like whitefish salad and chopped liver is gone. The menu seems to be slowly morphing into generic Boulder sandwich shop, which is very sad.)