Our normal tapas stop in Vegas is Cafe Ba-ba-reeba but we decided to try Firefly based on Yelp reviews and our desire to go "off-strip". The menu is much more extensive at Firefly than Cafe Ba-ba-reeba and very good. The filet mignon sliders are wonderful!
That being said, Cafe Ba-ba-reeba is still our favorite for overall tapas experience but we definitely enjoyed our visit to Firefly and would not hesitate to go back again.