Oh. My. God. I looooove this place!!
Amazing cocktails, first and foremost. That's what you go to the Lab. You don't go there to order a vodka-cranberry or a beer. You go there for the specialty cocktails prepared expertly by skilled mixologists using great liquors and ingredients.
Service is superb. You can order from the cocktail menu, or if you feel adventurous, you can provide some guidelines and they'll mix something up for you. For instance I'm a big mezcal lover and there were no mezcal cocktails in the menu. They proposed something mixed with scotch and it was fantastic!
Food is secondary there, small bites, but it taste good and can ensure you don't get drunk too fast.
Will I be back? Of course. I've already been back already multiple times.