The snacks there (tapas) are incredible! Everything is well done. The tequilas are top notch, with many top-shelf types that are difficult to come by in most bars - although, they can be a bit pricey.
For instance, a bottle on Don Julio 1942 goes for about $120 in most package stores. You can get a shot of it at La Cava for about $35. Ouch!... but oh so very tasty!
Best thing to do is to try some tapas and one of their tequila flights... but don't go running over to Mission Space too fast after a few of those!