Meh.  I've had better.  Maybe I'm spoiled because my first shawarma experience was in Chicago... and it was mouth-wateringly, still-dreaming-about-it delicious.  I have yet to find a good shawarma place in Vegas, which is both disappointing and surprising.  Amena Bakery & Deli is the best shawarma I've had so far in the area though.  The Olive was just disappointing all around.  The pitas may have been warm, but they were not pillowy at all, and weren't anything to write home about (Amena's pitas are AWESOME).  The shawarma had an ok flavor, but was kind of dry.  I've had better flavored falafel just about everywhere else I've been, though they did taste fresh, and had a nice texture.  Sadly, my favorite part of the dish was the lettuce, tomatoes, and tahini sauce... just sad.