Firefly is a good Tapas restaurant. The restaurant is quite large, so it's not too difficult to get a reservation. Also, the service was fast enough, and the food was enjoyable. There was nothing that blew me or Mr. Riches out of the water, but it was a good Tapas meal. This is more a spanish tapas restaurant. We went with a large group, so were able to try quite a few dishes. The stand out for me was the diablo shrimp. Out of all the dishes, it was definitely the best!
If you are in Las Vegas, and want to venture slightly off the strip for some reasonably priced good food, give firefly a try!