Well i have been to the NY street halaal guys and the tempe version tasted very different.
It wasn't bad, however the white sauce tasted different ( tasted like just mayo and ranch). NY one is much much different and yummy!. Also, tempe location do not have lamb, just chicken and beef. Hot sauce is thicker and hotter than NY version which is not necessarily a bad thing.
Overall, it was good but don't go in with the expectation that itll be like NY.