We travelled by taxi from the Coex in Gangnam to Go Woon Dang. The taxi driver followed the route on his GPS but had to drop us off 2 blocks away from the Go Woon Dang because the road was blocked. The driver, who spoke Korean only, gestured to us that he couldn't go forward and that we would need to walk the rest of the way. Not knowing where we were and not able to speak Korean, we phoned the Go Woon Dang guesthouse and spoke to the owner. He spoke to the taxi driver who told him where were and then sent someone to come get us and lead us by foot through the meandering road back to the guesthouse.
Upon arrival at the guesthouse, the staff continued to provide top-notch service (ie: by offering electrical adapters without being asked, directions to the nearest subway station, advice on visiting the nearby palace, etc)
What made this stay memorable was the attentiveness and professionalism of the staff.