A significant advantage is their ability to be launched from very simple portable launchers, making them harder to locate compared to traditional anti-aircraft systems like the 2K12 Kub or S-125 Neva.
However, the Huthis appear to be using something of a larger scale, likely vehicle-mounted like the 2K12 Kub anti-aircraft system, which is capable of reaching a target at altitudes up to 9.3 miles.