I would give this restaurant 4.5 stars.  Firefly was a really great restaurant with a nice ambience, friendly waiters, and yummy food.  Reservations are highly recommended if you have a big party.  We came as a party of 7 and we were seated on time with our reservation (waiting for 30 minutes after reservation time is one of my pet peeves).  We were worried about the portion sizes because most tapas are really really small.  But we were pleasantly surprised because each plate was large enough for all 7 of us to try and then go for seconds!  \n\n4.5 stars for:\n*friendly staff\n*clean bathrooms\n*large portions\n*excellent presenation of food\n*food came out FAST\n*nice variety of foods\n\nminus .5 star for their weak sangria... it was very watered down and i've had much better at other restaurants.  \n\nOther than that, I think i'll make this restaurant a regular dining experience everytime i come to vegas!