I had read about this place on happycow, and here's my O!burger review.
I read somewhere that Oburger makes their own veggie patty (that's vegan suitable), so when I stopped in a few months ago, I ordered the veggie patty burger. For my choice of sauce I chose the chipotle (vegan, spicy). The other sauces were thousand island (vegan) and ranch (veg but not vegan).
A server brought my burger to me rather quickly. The patty was hot, and the burger tasted quite delicious. I ate it up in no time. Cost was $8.49 before tax. No cheap to me, but this is West Hollywood and it's all organic. If you are super hungry, get 2 burgers.
One suggestion for improvement: the menu, while attempting to be a step-by-step ordering process, seemed a bit confusing to me at first. I had to study it to figure it out, so perhaps that could be simplified.
Cons: other stuff is meat