I've frequented Libertine a few times. I'm not a beer drinker, so hence, I'm rating it on atmosphere and food.
Atmosphere is OK. It gets quite busy and loud in there, if that's what you're looking for.
The food isn't all that great. At all. The first time I was there I ordered the trout salad. Out came a salad with a FULL trout, head attached, skin, belch yuk!! I do not want to pick through my food, skin it, and have a fish smiling back at me.
The next time I went I ordered the jerk chicken sandwich minus the bun. This was actually pretty tasty. The manager/owner gave us a free appetizer of deep fried chickpeas. They were interesting, but not something we finished or would order again.
The last visit there I ordered a gluten-free flat bread. It was pretty good, but there was soooo much flat bread, and not enough topping! The crust was great because it was actually a home made gluten free crust!