I've been at least 5 times now. It's a little out of the way but when I'm in the area this is my main stop.
It used to be a second branch of the Mercury but the owners had an amicable split and this was renamed Grinder.
Like Jimi S stated, the service is a little less cheeky than the Queen East Mercury location. But thankfully, their quality persists.
How can you not love a barista that insists I drink the espressos right away or they'll oxify too much? WTF? That geek love of the craft is why I love this place.