I went for brunch, which is the greatest meal of the day. Despite the service being pretty good and high quality people watching, I was very underwhelmed.
I ordered the Omelet, which is a 2 egg omelet, stuffed with sauteed onions and mushrooms with melted aged cheddar, and topped with roasted peppers and tomato. The omelet itself was decent, but I certainly can reproduce this at home without much effort. This would have been fine, but the omelet costs $14 and all you get is the omelet. No toast, home fries, or fruit as a side, unless you want to pay another $4-$6.
In my opinion, for $14 at brunch or breakfast I should either be full at the end and be able to say, "eh, that was decent" or the food should knock my socks off. I left O & B Canteen a little bit hungry and thinking, "that certainly wasn't worth it".
If you like seeing or being seen and want be overcharged for your food, give O & B Canteen a try. Otherwise, I would suggest that you skip it.