I've been to Rahier multiple times now. And I have to say that this is one of the top dessert places in Toronto.
They have everything from fresh croissants to tarts and an overwhelming selection of macarons. If you go to Rahier make sure you try the Earl Gray macaron. This was is Aaaamazing! The aromatic flavours of the Earl Gray work wonderfully with the dark chocolate filling.
I give Rahier Pastisserie 4.5*. (-0.5 because some of the items are a bit overpriced)