I went for the first time yesterday and had the crispy noodles with vegetables and the Ban with pork. Both dishes were really tasty and the flavours were well balanced. They also had a great hot sauce on our table that really perked things up! That being said I wouldn't say that Kim Bo is much better or worse than any of the other vietnamese places on Dundas. The only thing that sets them apart is that the atmosphere is nicer. The dining room has a lot of old wood in it and they have a gorgeous antique looking bar by the entrance. It makes me wonder what this place was before Kim Bo moved in! I also had a good experience with the waiters, we were in a hurry and they were great about accomodating us.
Overall I would say this is a satisfying and tasty place to eat. I will return if I'm in the area and hungry but wouldn't necessarily go out of my way.