Firefly is another las vegas restaurant I really like. not so much for the actual food but for the sangrias and ambiance.
The white sangrias here are excellent. I suggest getting a pitcher every time you come. The waiters and waitresses are great, they always keep your glass full.
The actual tapas are not bad. I would stay away from the thai salad.
this tapas bar is off strip. It is perfect if you are staying at the Embassy Suites since it is within walking distance.