Souvlaki Palace, Commack
Husband works nearby and FINALLY took my advice to try it, based upon a long ago Newsday review when it opened. He had a gyro without pita, and a Greek salad. He said it was really excellent, the place was packed with folks dining at tables and busy at the counter. Also said they told him they make their own gyros in house.
He felt like he'd had a really good sized lunch for $8.75... would have been even less if he'd just had a gyro with the bread.
52 Commack Rd, close to Jericho, on the west side of Commack Rd.