Unfortunately I am going to have to give this a 2 out of 5 which is disappointing as I am a huge fan of the Nak Won on Yonge street. My Fiancee and I were exploring the Chinatown area downtown when we noticed the Nak Won and decided to go in, rather than walking up to Koreatown to eat. The first big difference was simply the decoration of the actual inside - the Yonge street restaurant is much nicer inside.
The restaurant was quite busy and there were only 2 girls to take care of about 12 groups - they really needed to have 3 people on today (it was a Sunday Evening). The first issue came with our order. They brought us the wrong meat combination (bacon rather than sirloin) and they brought the wrong soup. Of course, they corrected this, but still it is annoying to have both items wrong. Also, when I asked them for a soda, they simply forgot about it. I had to ask again about 7 or 8 minutes later.
On a positive note, the food was fairly good (what I expected) and our server was helpful in getting us what we ordered, but we could see that she was obviously new. Given the lack of staff, the fact that the overall atmosphere is less "Korean" and its location, I don't forsee that we will return to this branch again hence the 2 out of 5 service. I highly recommend the one on Yonge street though.