The Green Beanery has several things going for it: awesome location looking out onto Bloor St. and the iconic Honest Ed's, great decor, funky coffee/tea gadgets to explore, and a decent cappuccino (good ratio of foam to milk). It's a great location if you are meeting someone for a coffee and conversation, if you want a quiet-ish study spot or to read a good book.
Now, for the reasons I gave it 3 stars rather than 5. First, there is no wifi - I sat there with my laptop open and was surprised to find that a big coffee shop like this in 2015 did not have a network. Second, the cashiers weren't the friendliest people - not rude per se, but disinterested? No smiles, warm greeting or enthusiasm... but maybe I'm just used to Starbucks.
Overall, I was happy with my experience and will likely return, just not when I need to do anything that requires wifi.