I was not impressed. I've lived in Pittsburgh for forever and have tried all the Korean restaurants. Korea garden left a lot to the imagination.
They had an extensive menu from my recollection and all seemed pretty authentic. You don't see naengmyeon on the menu at places around here typically. Unfortunately...they were out of the dishes we wanted in particular. The soups were pretty good. The soondubu had good flavor and wasn't overpoweringly spicy. The LA style galbi we ordered was decent was well. Overall opinion is that the food is grossly overpriced. Especially for being in a very college environment. The price was not worth the overall experience in my opinion.
Service was less than stellar. The waiter just started, so I give him the benefit of the doubt with not being familiar with the menu, but our order was wrong when it came out. We took it anyway since we've been waiting so long for our food and were running short on time. When we went to pay our bill it took maybe 10 minutes for is to get the check back for signature.