Excellent tapas! I am picky and I think I've tried more than half the menu and every dish has been outstanding. The Sangria is also very tasty... I ended up drinking almost an entire pitcher last time I went!
The line is usually out the door and parking is limited. The restaurant is next to the popular Ruth's Chris Steak House and a few other restaurants. Makes parking a hassle as the lot in front of the businesses gets filled quickly. There is parking behind Ruth's Chris and a walkway from the back parking lot to the front but it is a bit hidden.
Firefly is one of my favorite restaurants in Vegas.