Nunu is a great Ethiopian restaurant in Toronto. It's not my #1 favorite which is Rendez-Vouz over in the east end but I would definitely return to Nunu when I'm in the area.
It's run by the two owners themselves and they regularly come out to speak to their guests. The food is great, the prices are reasonable, and the service is good too. That last point is important because just about every Ethiopian restaurant I've been to other than Nunu and Rendez-Vouz seem to go out of their way to define slow service!
As you can see, I definitely have no problem endorsing Nunu and I am confident that you'll have a great time when you go yourself. :)