Sorry - I know I'm going back to an old thread, but wanted to pass along our experiences just in case it may be helpful to anyone else.
DH & I made it to La Cava del Tequila on the 20th and wish we'd given ourselves more than just 1/2 hour. We arrived around 8:30p with plans of trying a flight and then going out to see Illuminations. Next time we go back we've decided to allow ourselves a good 2 hours for the Tequila bar.
I had a flight of tequila and DH had a mixed drink. I don't remember the name of the flight I had, but I did think that the Don Julio wasn't bad - I'll be looking for that next time I need to pick up tequila at the liquor store. They offered 3 different flights ranging from around $15 to $25.
We did not eat there, so can't comment on the food.
DH's drink was a Hibiscus margarita (or something along those lines). It was sweet, but I liked the little taste of it I had.
They had a pretty extensive menu of tequila & mixed drinks. They also had more standard libations like beer & wine for folks not feeling quite so adventurous.
The staff was awesome!

Friendly and helpful. Because we were celebrating my birthday they treated me to one free drink.
I would definately recommend anyone interested stop in, give yourself more than half an hour and enjoy this little gem!
Here are some pix from our vist there:
Trying my first shot (there are 3 shots of tequila + a little tomato juice to sip between to clean your palet).
Yeah - it was that good/bad. Don't you love that liquor face?
The finished flight.... Like I mentioned earlier, the Don Julio was actually fairly smooth (as far as tequila goes).
DH enjoying his boat drink.
Handful of shots from inside. It is larger than it looks from outside. The bar is small, but there are lots of tables.