I went tonight! Deb, I don't know you, but based on your post, I think we sat near your group - about 7 or 8 ladies? We got there at 8 and were finishing up around 9.
This was easily one of the best meals I've had in Louisville in quite a while. Neither of us was even particularly hungry tonight - we were just so eager to try Guaca Mole! We started with the chips and salsa: a basket of thick, crunchy corn chips and a trio of salsas as visually appealing as they were delicious. The salsas tonight were a roasted red pepper and onion; a tomatillo; and a spicy guajillo-based salsa. Each was delicious. The tomatillo was thick and tangy, the guajillo was smoky with just the right amount of heat, and the red pepper and onion was ever so slightly sweet and mild without being at all bland.
Next, we split the pepita and goat cheese salad. It was much bigger than I expected - a bed of arugula topped with golden raisins, halved cherry tomatoes, a light vinaigrette, and two pepita-encrusted goat cheese medallions. This wasn't a new combination of flavors, but the execution was excellent.
I wasn't sure how things could get any better when my vegetable tamales arrived. Leah, I knew that's what I wanted to order before I even arrived after reading your review! Holy. Guacamole. The presentation was flawless - an unrolled corn tamale husk, topped with masa, potato, mushrooms, and perfectly cooked asparagus, then drizzled with a light sauce and cotijo cheese. Three sweet plantains finished the meal. The flavors were incredible - nothing dominated, but everything seemed to blend into one mind-blowingly good tamale.
My other half ordered the fish tacos: three tacos, each served in a pair of housemade corn tortillas, topped with crema and pickled red onions. Again, the serving size surprised me here; I was expecting very small portions, but each taco held a good-sized piece of fish. The only possible negative I could find - and then even just a matter of opinion - is that the fish is fried; I prefer grilled. (In fairness, since I wasn't the one ordering, I didn't ask if grilled was an option - it well could be & I will ask next time I'm in.)
Finally, no review would be complete without a mention of the beverage program.

After just glancing at the drink menu, my immediate thought was that I really need to return on a night when I could spend some quality time at the bar. A few highlights: a mango-chile margarita; a michelada made with tomato sauce; their spin on the Bloody Mary; and a tamarind-flavored margarita - which what I ended up ordering. It came in an old-fashioned glass with a chile rim and a sugar cane spear, reminding me of Martinez's connection to Havana Rumba/Mojito's. Delicious. They also have Negra Modelo, a personal favorite, on draft.
All I can say after returning home is that I wish I would've been hungrier. I'm excited to see how things unfold over the next few weeks. I could envision this place becoming a new hotspot, but the location is odd - for comparison, Limestone is right down the road, serves excellent food, and yet always seems to be half-empty when I'm there. I'm torn between shouting Guaca's praises to everyone I know and attempting to keep this secret for myself a few weeks longer. Anyways, all this rambling to say - it's excellent! Go! =)