It's tricky rating a convention center. I've been to quite a few in the USA, and although the Metro Toronto Convention Centre is quite a bit smaller than McCormick Place in Chicago or the Georgia World Congress Center in Atlanta, it exceeds both in cleanliness, efficiency, and ease of use. Conveniently located in downtown Toronto, there are quite a few dining, shopping, and lodging options nearby. The MTCC is directly connected to the InterContinental, which is nice if the weather is not ideal for walking outdoors.