The Dark Horse has pretty much been covered in previous reviews. I have to say - I am a fan. My favorite things here are the baked goods, and while I was walking down there to get a banana chocolate chip muffin the other day and I composed this jingle for them in my head:
BA-nanananananananana chocolate chip!
BA-nanananananananana chocolate chip!
baNAna chocolate chip, banana CHOcolate chocolate chip,
BA-nananananananaNAna chocolate chip.
Then, they were out of Banana Chocolate Chips muffins, but they had banana chocolate chip loaf slices instead which turned out to be a fine substitute.
I occasionally get beans there to go, and although they don't roast the beans themselves, they only stock top tier product.
People here have raved about the communal table, which I am also in love with. Not because I enjoy sitting with strangers, but because it appears to be made of reclaimed bleachers (I don't know if it actually is). I much prefer the decor here to the new Dark Horse at Dundas & Spadina.
I only rate it 4 stars and not 5 stars because I really appreciate Mercury's feature menu where they have a new type of espresso about once a week - Dark Horse always uses 49th parallel espresso, and I would like to see a weekly feature added. It is otherwise perfect.