I had a ho hum experience at Firefly.
Our party wanted to have a lighter fare for dinner before hitting the clubs later that night (and the pool the next day) so we though tapas would be a great idea.
I tried the sliders, bacon wrapped dates, and macaroni cheese. The sliders I think were the best thing I tried, followed closely by the dates. The mac and cheese was nothing special. I looked around and everything were a decent size and price. Everyone seemed happy with what they got. I also tried the sangria which again, was lackluster in my opinion. It did nothing really to continue my buzz started earlier on in the day.
We also had two or three of our tapas "forgotten" so when we checked with the waiter, the explanation was that the order was never written down. Oh well, not a huge loss.
Not bad, but again, not compelling enough for me to come back when I am in Vegas again. It is a little out of the way from the strip so plan accordingly, our taxi driver got lost on the way there...