I'm not middle eastern but I believe shawarma should taste good on its own. Sauce should only enhance the taste, not be the only source of taste. I've tried their chicken shawarma plate and the chicken shawarma on the rocks. The meat itself is pretty bland without the sauces. I think this defeats the whole purpose of grilling it on a spit with spices. You might as well have boiled chicken slices and add the sauces.
That said, this place does give you good value. A regular lazeez on the rocks will fill up even the biggest eaters and I can't fathom anyone eating a large version on their own. Amazingly it's only $6.99 for regular and $8.99 for a large. That's great value.
Would I come back? Yes. No other shawarma options in the area and it's good value.