I was pretty disappointed with Hiya. We met up with them at Free Range Brewery one night. Ordered the brewery special ($10). It came with your choice of bowl and 3 dumplings. The dumplings were disappointing. They were cooked to a nice crisp on the outside but veggie filling did not have an appealing texture. The sauce that they used didn't really work for me either. The spicy mayo made it very heavy. A lighter dumpling wrapper and a more savory dipping sauce would grealty improve the dumplings.
We opted for the spicy pork bowl. The idea intrigued me but the actual execution was a let down. Being Korean, I was expecting the awesome depth of flavors that come from good spicy pork. The flavor was barely there. The bowl had an interesting combination of ingredients but I don't know that it really worked. There were also only 3 very small pieces daikon (pickled radish). A little more would have been nice for some more texture. A larger serving container would have also been nice. It was hard to get to the ingredients buried in the bottom without kicking the things on top out on to the table.
Overall, I'd be willing to give them another shot but they'll have to improve a few things before I'll return.