My first time there was about a year ago (it's a bit far for me since I live in Mississauga), and I went with some friends who go there regularly. We had 4 dishes split among the 4 (and a kiddo) of us and there was still plenty of leftovers. Portion size is not an issue :)
My favorite dishes are the Cavatelli Pasta and the Smoked Proscuitto Pizza. I'm more peculiar about my pizza than my pastas but Levetto exceeded my expectations for pizza.
The people there are super friendly and accommodating. They don't just make and serve the food, they actually converse with the customers, which is why I've recommended it to so many of my friends.
I went there a second time not too long ago and met the manager from the downtown locations (not opened yet) who was super friendly! Go for the food, atmosphere and great cappuccinos.
Also the reason why I am giving it 4/5 is only because this location is pretty small. I know it's supposed to be more a fast food place but it would be nice if they could get a few more tables in, which I know isn't possible unfortunately. Other than that, one of my faves!