We flew Frontier out of Islip on February 16th. Our flight was fine. The only negative is they have very little leg room and the seats are not the most comfortable in the world. We took off on time (actually I think we took off a few minutes early). The flight attendants were very nice. If you want anything to eat or drink you have to pay extra for it. The gates are far from the security checkpoint, but it's not a big deal since Islip is not big.