Let me be that annoying girl that's been on exchange and comes back telling you about all the wonderful food she's had there and how it doesn't compare - jokes.
But seriously, macarons here aren't the best, but they aren't terrible either. I haven't found the best macaron shop yet in Toronto but Butter Avenue does a pretty good job of trying. Why I don't fancy their macarons too much is because their macaron shell is a bit sticky and dense - not the light crumbly shell I know of and love. Their filling also lacks a real punch of flavour. I do like thar they offer Asian fusion flavours though, so points for creativity!
I also checked out their afternoon tea, it's more dessert heavy compared to actual afternoon tea and for roughly the same price too so I wasn't too impressed. I'm not sure if they even have a kitchen at this location or if the items were just shipped here. They only have like 4 tables here and I don't think they carry most of their afternoon tea items regularly so yes, make a reservation. However, if you're looking for an actual afternoon tea experience, your best bet is to probably look elsewhere.
Overall, good place to grab a quick macaron to satisfy your cravings but don't count on it to be anything special.